diff options
Diffstat (limited to 'utils/extconf.c')
| -rw-r--r-- | utils/extconf.c | 1480 |
1 files changed, 742 insertions, 738 deletions
diff --git a/utils/extconf.c b/utils/extconf.c index 5d4b21eac..9903ff295 100644 --- a/utils/extconf.c +++ b/utils/extconf.c @@ -23,6 +23,7 @@ * for operations outside of asterisk. A huge, awful hack. * */ +#undef DEBUG_THREADS #include "asterisk/compat.h" #include "asterisk/paths.h" /* we use AST_CONFIG_DIR */ @@ -65,10 +66,9 @@ struct ast_channel #include "asterisk/inline_api.h" #include "asterisk/endian.h" #include "asterisk/ast_expr.h" -#include "asterisk/ael_structs.h" -#include "asterisk/pval.h" /* logger.h */ + #define EVENTLOG "event_log" #define QUEUELOG "queue_log" @@ -147,6 +147,746 @@ void ast_console_toggle_mute(int fd); #define __LOG_DTMF 6 #define LOG_DTMF __LOG_DTMF, _A_ +/* lock.h */ + +#ifndef HAVE_MTX_PROFILE +#define __MTX_PROF(a) return pthread_mutex_lock((a)) +#else +#define __MTX_PROF(a) do { \ + int i; \ + /* profile only non-blocking events */ \ + ast_mark(mtx_prof, 1); \ + i = pthread_mutex_trylock((a)); \ + ast_mark(mtx_prof, 0); \ + if (!i) \ + return i; \ + else \ + return pthread_mutex_lock((a)); \ + } while (0) +#endif /* HAVE_MTX_PROFILE */ + +#define AST_PTHREADT_NULL (pthread_t) -1 +#define AST_PTHREADT_STOP (pthread_t) -2 + +#if defined(SOLARIS) || defined(BSD) +#define AST_MUTEX_INIT_W_CONSTRUCTORS +#endif /* SOLARIS || BSD */ + +/* Asterisk REQUIRES recursive (not error checking) mutexes + and will not run without them. */ +#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) && defined(PTHREAD_MUTEX_RECURSIVE_NP) +#define PTHREAD_MUTEX_INIT_VALUE PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP +#define AST_MUTEX_KIND PTHREAD_MUTEX_RECURSIVE_NP +#else +#define PTHREAD_MUTEX_INIT_VALUE PTHREAD_MUTEX_INITIALIZER +#define AST_MUTEX_KIND PTHREAD_MUTEX_RECURSIVE +#endif /* PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP */ + +#ifdef DEBUG_THREADS + +#define __ast_mutex_logger(...) do { if (canlog) ast_log(LOG_ERROR, __VA_ARGS__); else fprintf(stderr, __VA_ARGS__); } while (0) + +#ifdef THREAD_CRASH +#define DO_THREAD_CRASH do { *((int *)(0)) = 1; } while(0) +#else +#define DO_THREAD_CRASH do { } while (0) +#endif + +#define AST_MUTEX_INIT_VALUE { PTHREAD_MUTEX_INIT_VALUE, { NULL }, { 0 }, 0, { NULL }, { 0 } } + +#define AST_MAX_REENTRANCY 10 + +struct ast_mutex_info { + pthread_mutex_t mutex; + /*! Track which thread holds this lock */ + unsigned int track:1; + const char *file[AST_MAX_REENTRANCY]; + int lineno[AST_MAX_REENTRANCY]; + int reentrancy; + const char *func[AST_MAX_REENTRANCY]; + pthread_t thread[AST_MAX_REENTRANCY]; +}; + +typedef struct ast_mutex_info ast_mutex_t; + +typedef pthread_cond_t ast_cond_t; + +static pthread_mutex_t empty_mutex; + +static void __attribute__((constructor)) init_empty_mutex(void) +{ + memset(&empty_mutex, 0, sizeof(empty_mutex)); +} + +static inline int __ast_pthread_mutex_init_attr(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t, + pthread_mutexattr_t *attr) +{ +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + int canlog = strcmp(filename, "logger.c"); + + if ((t->mutex) != ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + if ((t->mutex) != (empty_mutex)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is already initialized.\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): Error: previously initialization of mutex '%s'.\n", + t->file[0], t->lineno[0], t->func[0], mutex_name); + DO_THREAD_CRASH; + return 0; + } + } +#endif + + t->file[0] = filename; + t->lineno[0] = lineno; + t->func[0] = func; + t->thread[0] = 0; + t->reentrancy = 0; + + return pthread_mutex_init(&t->mutex, attr); +} + +static inline int __ast_pthread_mutex_init(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + static pthread_mutexattr_t attr; + + pthread_mutexattr_init(&attr); + pthread_mutexattr_settype(&attr, AST_MUTEX_KIND); + + return __ast_pthread_mutex_init_attr(filename, lineno, func, mutex_name, t, &attr); +} +#define ast_mutex_init(pmutex) __ast_pthread_mutex_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #pmutex, pmutex) + +static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + } +#endif + + res = pthread_mutex_trylock(&t->mutex); + switch (res) { + case 0: + pthread_mutex_unlock(&t->mutex); + break; + case EINVAL: + __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy invalid mutex '%s'.\n", + filename, lineno, func, mutex_name); + break; + case EBUSY: + __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy locked mutex '%s'.\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): Error: '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); + break; + } + + if ((res = pthread_mutex_destroy(&t->mutex))) + __ast_mutex_logger("%s line %d (%s): Error destroying mutex: %s\n", + filename, lineno, func, strerror(res)); +#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP + else + t->mutex = PTHREAD_MUTEX_INIT_VALUE; +#endif + t->file[0] = filename; + t->lineno[0] = lineno; + t->func[0] = func; + + return res; +} + +static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, const char *func, + const char* mutex_name, ast_mutex_t *t) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + ast_mutex_init(t); + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + +#ifdef DETECT_DEADLOCKS + { + time_t seconds = time(NULL); + time_t current; + do { +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 1); +#endif + res = pthread_mutex_trylock(&t->mutex); +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 0); +#endif + if (res == EBUSY) { + current = time(NULL); + if ((current - seconds) && (!((current - seconds) % 5))) { + __ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n", + filename, lineno, func, (int)(current - seconds), mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], + t->func[t->reentrancy-1], mutex_name); + } + usleep(200); + } + } while (res == EBUSY); + } +#else +#ifdef HAVE_MTX_PROFILE + ast_mark(mtx_prof, 1); + res = pthread_mutex_trylock(&t->mutex); + ast_mark(mtx_prof, 0); + if (res) +#endif + res = pthread_mutex_lock(&t->mutex); +#endif /* DETECT_DEADLOCKS */ + + if (!res) { + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + } else { + __ast_mutex_logger("%s line %d (%s): Error obtaining mutex: %s\n", + filename, lineno, func, strerror(errno)); + DO_THREAD_CRASH; + } + + return res; +} + +static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno, const char *func, + const char* mutex_name, ast_mutex_t *t) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + ast_mutex_init(t); + } +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + + if (!(res = pthread_mutex_trylock(&t->mutex))) { + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + } else { + __ast_mutex_logger("%s line %d (%s): Warning: '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); + } + + return res; +} + +static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, const char *func, + const char *mutex_name, ast_mutex_t *t) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + } +#endif + + if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + + if ((res = pthread_mutex_unlock(&t->mutex))) { + __ast_mutex_logger("%s line %d (%s): Error releasing mutex: %s\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } + + return res; +} + +static inline int __ast_cond_init(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond, pthread_condattr_t *cond_attr) +{ + return pthread_cond_init(cond, cond_attr); +} + +static inline int __ast_cond_signal(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_signal(cond); +} + +static inline int __ast_cond_broadcast(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_broadcast(cond); +} + +static inline int __ast_cond_destroy(const char *filename, int lineno, const char *func, + const char *cond_name, ast_cond_t *cond) +{ + return pthread_cond_destroy(cond); +} + +static inline int __ast_cond_wait(const char *filename, int lineno, const char *func, + const char *cond_name, const char *mutex_name, + ast_cond_t *cond, ast_mutex_t *t) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + } +#endif + + if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + + if ((res = pthread_cond_wait(cond, &t->mutex))) { + __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } else { + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + } + + return res; +} + +static inline int __ast_cond_timedwait(const char *filename, int lineno, const char *func, + const char *cond_name, const char *mutex_name, ast_cond_t *cond, + ast_mutex_t *t, const struct timespec *abstime) +{ + int res; + int canlog = strcmp(filename, "logger.c"); + +#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS + if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { + __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", + filename, lineno, func, mutex_name); + } +#endif + + if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { + __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", + filename, lineno, func, mutex_name); + __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", + t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); + DO_THREAD_CRASH; + } + + if (--t->reentrancy < 0) { + __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", + filename, lineno, func, mutex_name); + t->reentrancy = 0; + } + + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = NULL; + t->lineno[t->reentrancy] = 0; + t->func[t->reentrancy] = NULL; + t->thread[t->reentrancy] = 0; + } + + if ((res = pthread_cond_timedwait(cond, &t->mutex, abstime)) && (res != ETIMEDOUT)) { + __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", + filename, lineno, func, strerror(res)); + DO_THREAD_CRASH; + } else { + if (t->reentrancy < AST_MAX_REENTRANCY) { + t->file[t->reentrancy] = filename; + t->lineno[t->reentrancy] = lineno; + t->func[t->reentrancy] = func; + t->thread[t->reentrancy] = pthread_self(); + t->reentrancy++; + } else { + __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", + filename, lineno, func, mutex_name); + } + } + + return res; +} + +#define ast_mutex_destroy(a) __ast_pthread_mutex_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) +#define ast_mutex_lock(a) __ast_pthread_mutex_lock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) +#define ast_mutex_unlock(a) __ast_pthread_mutex_unlock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) +#define ast_mutex_trylock(a) __ast_pthread_mutex_trylock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) +#define ast_cond_init(cond, attr) __ast_cond_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond, attr) +#define ast_cond_destroy(cond) __ast_cond_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) +#define ast_cond_signal(cond) __ast_cond_signal(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) +#define ast_cond_broadcast(cond) __ast_cond_broadcast(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) +#define ast_cond_wait(cond, mutex) __ast_cond_wait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex) +#define ast_cond_timedwait(cond, mutex, time) __ast_cond_timedwait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex, time) + +#else /* !DEBUG_THREADS */ + + +typedef pthread_mutex_t ast_mutex_t; + +#define AST_MUTEX_INIT_VALUE ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE) + +static inline int ast_mutex_init(ast_mutex_t *pmutex) +{ + pthread_mutexattr_t attr; + + pthread_mutexattr_init(&attr); + pthread_mutexattr_settype(&attr, AST_MUTEX_KIND); + + return pthread_mutex_init(pmutex, &attr); +} + +#define ast_pthread_mutex_init(pmutex,a) pthread_mutex_init(pmutex,a) + +static inline int ast_mutex_unlock(ast_mutex_t *pmutex) +{ + return pthread_mutex_unlock(pmutex); +} + +static inline int ast_mutex_destroy(ast_mutex_t *pmutex) +{ + return pthread_mutex_destroy(pmutex); +} + +static inline int ast_mutex_lock(ast_mutex_t *pmutex) +{ + __MTX_PROF(pmutex); +} + +static inline int ast_mutex_trylock(ast_mutex_t *pmutex) +{ + return pthread_mutex_trylock(pmutex); +} + +typedef pthread_cond_t ast_cond_t; + +static inline int ast_cond_init(ast_cond_t *cond, pthread_condattr_t *cond_attr) +{ + return pthread_cond_init(cond, cond_attr); +} + +static inline int ast_cond_signal(ast_cond_t *cond) +{ + return pthread_cond_signal(cond); +} + +static inline int ast_cond_broadcast(ast_cond_t *cond) +{ + return pthread_cond_broadcast(cond); +} + +static inline int ast_cond_destroy(ast_cond_t *cond) +{ + return pthread_cond_destroy(cond); +} + +static inline int ast_cond_wait(ast_cond_t *cond, ast_mutex_t *t) +{ + return pthread_cond_wait(cond, t); +} + +static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const struct timespec *abstime) +{ + return pthread_cond_timedwait(cond, t, abstime); +} + +#endif /* !DEBUG_THREADS */ + +#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) +/* If AST_MUTEX_INIT_W_CONSTRUCTORS is defined, use file scope + constructors/destructors to create/destroy mutexes. */ +#define __AST_MUTEX_DEFINE(scope, mutex) \ + scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE; \ +static void __attribute__ ((constructor)) init_##mutex(void) \ +{ \ + ast_mutex_init(&mutex); \ +} \ +static void __attribute__ ((destructor)) fini_##mutex(void) \ +{ \ + ast_mutex_destroy(&mutex); \ +} +#else /* !AST_MUTEX_INIT_W_CONSTRUCTORS */ +/* By default, use static initialization of mutexes. */ +#define __AST_MUTEX_DEFINE(scope, mutex) \ + scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE +#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ + +#define pthread_mutex_t use_ast_mutex_t_instead_of_pthread_mutex_t +#define pthread_mutex_lock use_ast_mutex_lock_instead_of_pthread_mutex_lock +#define pthread_mutex_unlock use_ast_mutex_unlock_instead_of_pthread_mutex_unlock +#define pthread_mutex_trylock use_ast_mutex_trylock_instead_of_pthread_mutex_trylock +#define pthread_mutex_init use_ast_mutex_init_instead_of_pthread_mutex_init +#define pthread_mutex_destroy use_ast_mutex_destroy_instead_of_pthread_mutex_destroy +#define pthread_cond_t use_ast_cond_t_instead_of_pthread_cond_t +#define pthread_cond_init use_ast_cond_init_instead_of_pthread_cond_init +#define pthread_cond_destroy use_ast_cond_destroy_instead_of_pthread_cond_destroy +#define pthread_cond_signal use_ast_cond_signal_instead_of_pthread_cond_signal +#define pthread_cond_broadcast use_ast_cond_broadcast_instead_of_pthread_cond_broadcast +#define pthread_cond_wait use_ast_cond_wait_instead_of_pthread_cond_wait +#define pthread_cond_timedwait use_ast_cond_timedwait_instead_of_pthread_cond_timedwait + +#define AST_MUTEX_DEFINE_STATIC(mutex) __AST_MUTEX_DEFINE(static, mutex) + +#define AST_MUTEX_INITIALIZER __use_AST_MUTEX_DEFINE_STATIC_rather_than_AST_MUTEX_INITIALIZER__ + +#define gethostbyname __gethostbyname__is__not__reentrant__use__ast_gethostbyname__instead__ + +#ifndef __linux__ +#define pthread_create __use_ast_pthread_create_instead__ +#endif + +typedef pthread_rwlock_t ast_rwlock_t; + +static inline int ast_rwlock_init(ast_rwlock_t *prwlock) +{ + pthread_rwlockattr_t attr; + + pthread_rwlockattr_init(&attr); + +#ifdef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP + pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP); +#endif + + return pthread_rwlock_init(prwlock, &attr); +} + +static inline int ast_rwlock_destroy(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_destroy(prwlock); +} + +static inline int ast_rwlock_unlock(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_unlock(prwlock); +} + +static inline int ast_rwlock_rdlock(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_rdlock(prwlock); +} + +static inline int ast_rwlock_tryrdlock(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_tryrdlock(prwlock); +} + +static inline int ast_rwlock_wrlock(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_wrlock(prwlock); +} + +static inline int ast_rwlock_trywrlock(ast_rwlock_t *prwlock) +{ + return pthread_rwlock_trywrlock(prwlock); +} + +/* Statically declared read/write locks */ + +#ifndef HAVE_PTHREAD_RWLOCK_INITIALIZER +#define __AST_RWLOCK_DEFINE(scope, rwlock) \ + scope ast_rwlock_t rwlock; \ +static void __attribute__ ((constructor)) init_##rwlock(void) \ +{ \ + ast_rwlock_init(&rwlock); \ +} \ +static void __attribute__ ((destructor)) fini_##rwlock(void) \ +{ \ + ast_rwlock_destroy(&rwlock); \ +} +#else +#define AST_RWLOCK_INIT_VALUE PTHREAD_RWLOCK_INITIALIZER +#define __AST_RWLOCK_DEFINE(scope, rwlock) \ + scope ast_rwlock_t rwlock = AST_RWLOCK_INIT_VALUE +#endif + +#define AST_RWLOCK_DEFINE_STATIC(rwlock) __AST_RWLOCK_DEFINE(static, rwlock) + +/* + * Initial support for atomic instructions. + * For platforms that have it, use the native cpu instruction to + * implement them. For other platforms, resort to a 'slow' version + * (defined in utils.c) that protects the atomic instruction with + * a single lock. + * The slow versions is always available, for testing purposes, + * as ast_atomic_fetchadd_int_slow() + */ + +#if defined(HAVE_OSX_ATOMICS) +#include "libkern/OSAtomic.h" +#endif + +/*! \brief Atomically add v to *p and return * the previous value of *p. + * This can be used to handle reference counts, and the return value + * can be used to generate unique identifiers. + */ + +#if defined(HAVE_GCC_ATOMICS) +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + return __sync_fetch_and_add(p, v); +}) +#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4) +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + return OSAtomicAdd32(v, (int32_t *) p); +}) +#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8) +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + return OSAtomicAdd64(v, (int64_t *) p); +#elif defined (__i386__) || defined(__x86_64__) +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + __asm __volatile ( + " lock xaddl %0, %1 ; " + : "+r" (v), /* 0 (result) */ + "=m" (*p) /* 1 */ + : "m" (*p)); /* 2 */ + return (v); +}) +#else +static int ast_atomic_fetchadd_int_slow(volatile int *p, int v) +{ + int ret; + ret = *p; + *p += v; + return ret; +} +AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), +{ + return ast_atomic_fetchadd_int_slow(p, v); +}) +#endif + +/*! \brief decrement *p by 1 and return true if the variable has reached 0. + * Useful e.g. to check if a refcount has reached 0. + */ +#if defined(HAVE_GCC_ATOMICS) +AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), +{ + return __sync_sub_and_fetch(p, 1) == 0; +}) +#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4) +AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), +{ + return OSAtomicAdd32( -1, (int32_t *) p) == 0; +}) +#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8) +AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), +{ + return OSAtomicAdd64( -1, (int64_t *) p) == 0; +#else +AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), +{ + int a = ast_atomic_fetchadd_int(p, -1); + return a == 1; /* true if the value is 0 now (so it was 1 previously) */ +}) +#endif + +#ifndef DEBUG_CHANNEL_LOCKS +/*! \brief Lock a channel. If DEBUG_CHANNEL_LOCKS is defined + in the Makefile, print relevant output for debugging */ +#define ast_channel_lock(x) ast_mutex_lock(&x->lock) +/*! \brief Unlock a channel. If DEBUG_CHANNEL_LOCKS is defined + in the Makefile, print relevant output for debugging */ +#define ast_channel_unlock(x) ast_mutex_unlock(&x->lock) +/*! \brief Try locking a channel. If DEBUG_CHANNEL_LOCKS is defined + in the Makefile, print relevant output for debugging */ +#define ast_channel_trylock(x) ast_mutex_trylock(&x->lock) +#else + +/*! \brief Lock AST channel (and print debugging output) +\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ +int ast_channel_lock(struct ast_channel *chan); + +/*! \brief Unlock AST channel (and print debugging output) +\note You need to enable DEBUG_CHANNEL_LOCKS for this function +*/ +int ast_channel_unlock(struct ast_channel *chan); + +/*! \brief Lock AST channel (and print debugging output) +\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ +int ast_channel_trylock(struct ast_channel *chan); +#endif + + +#include "asterisk/hashtab.h" +#include "asterisk/ael_structs.h" +#include "asterisk/pval.h" + /* from utils.h */ static unsigned int __unsigned_int_flags_dummy; @@ -1119,742 +1859,6 @@ extern int ast_language_is_prefix; -/* lock.h */ - -#ifndef HAVE_MTX_PROFILE -#define __MTX_PROF(a) return pthread_mutex_lock((a)) -#else -#define __MTX_PROF(a) do { \ - int i; \ - /* profile only non-blocking events */ \ - ast_mark(mtx_prof, 1); \ - i = pthread_mutex_trylock((a)); \ - ast_mark(mtx_prof, 0); \ - if (!i) \ - return i; \ - else \ - return pthread_mutex_lock((a)); \ - } while (0) -#endif /* HAVE_MTX_PROFILE */ - -#define AST_PTHREADT_NULL (pthread_t) -1 -#define AST_PTHREADT_STOP (pthread_t) -2 - -#if defined(SOLARIS) || defined(BSD) -#define AST_MUTEX_INIT_W_CONSTRUCTORS -#endif /* SOLARIS || BSD */ - -/* Asterisk REQUIRES recursive (not error checking) mutexes - and will not run without them. */ -#if defined(PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP) && defined(PTHREAD_MUTEX_RECURSIVE_NP) -#define PTHREAD_MUTEX_INIT_VALUE PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP -#define AST_MUTEX_KIND PTHREAD_MUTEX_RECURSIVE_NP -#else -#define PTHREAD_MUTEX_INIT_VALUE PTHREAD_MUTEX_INITIALIZER -#define AST_MUTEX_KIND PTHREAD_MUTEX_RECURSIVE -#endif /* PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP */ - -#ifdef DEBUG_THREADS - -#define __ast_mutex_logger(...) do { if (canlog) ast_log(LOG_ERROR, __VA_ARGS__); else fprintf(stderr, __VA_ARGS__); } while (0) - -#ifdef THREAD_CRASH -#define DO_THREAD_CRASH do { *((int *)(0)) = 1; } while(0) -#else -#define DO_THREAD_CRASH do { } while (0) -#endif - -#define AST_MUTEX_INIT_VALUE { PTHREAD_MUTEX_INIT_VALUE, { NULL }, { 0 }, 0, { NULL }, { 0 } } - -#define AST_MAX_REENTRANCY 10 - -struct ast_mutex_info { - pthread_mutex_t mutex; - /*! Track which thread holds this lock */ - unsigned int track:1; - const char *file[AST_MAX_REENTRANCY]; - int lineno[AST_MAX_REENTRANCY]; - int reentrancy; - const char *func[AST_MAX_REENTRANCY]; - pthread_t thread[AST_MAX_REENTRANCY]; -}; - -typedef struct ast_mutex_info ast_mutex_t; - -typedef pthread_cond_t ast_cond_t; - -static pthread_mutex_t empty_mutex; - -static void __attribute__((constructor)) init_empty_mutex(void) -{ - memset(&empty_mutex, 0, sizeof(empty_mutex)); -} - -static inline int __ast_pthread_mutex_init_attr(const char *filename, int lineno, const char *func, - const char *mutex_name, ast_mutex_t *t, - pthread_mutexattr_t *attr) -{ -#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS - int canlog = strcmp(filename, "logger.c"); - - if ((t->mutex) != ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - if ((t->mutex) != (empty_mutex)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is already initialized.\n", - filename, lineno, func, mutex_name); - __ast_mutex_logger("%s line %d (%s): Error: previously initialization of mutex '%s'.\n", - t->file[0], t->lineno[0], t->func[0], mutex_name); - DO_THREAD_CRASH; - return 0; - } - } -#endif - - t->file[0] = filename; - t->lineno[0] = lineno; - t->func[0] = func; - t->thread[0] = 0; - t->reentrancy = 0; - - return pthread_mutex_init(&t->mutex, attr); -} - -static inline int __ast_pthread_mutex_init(const char *filename, int lineno, const char *func, - const char *mutex_name, ast_mutex_t *t) -{ - static pthread_mutexattr_t attr; - - pthread_mutexattr_init(&attr); - pthread_mutexattr_settype(&attr, AST_MUTEX_KIND); - - return __ast_pthread_mutex_init_attr(filename, lineno, func, mutex_name, t, &attr); -} -#define ast_mutex_init(pmutex) __ast_pthread_mutex_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #pmutex, pmutex) - -static inline int __ast_pthread_mutex_destroy(const char *filename, int lineno, const char *func, - const char *mutex_name, ast_mutex_t *t) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - } -#endif - - res = pthread_mutex_trylock(&t->mutex); - switch (res) { - case 0: - pthread_mutex_unlock(&t->mutex); - break; - case EINVAL: - __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy invalid mutex '%s'.\n", - filename, lineno, func, mutex_name); - break; - case EBUSY: - __ast_mutex_logger("%s line %d (%s): Error: attempt to destroy locked mutex '%s'.\n", - filename, lineno, func, mutex_name); - __ast_mutex_logger("%s line %d (%s): Error: '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); - break; - } - - if ((res = pthread_mutex_destroy(&t->mutex))) - __ast_mutex_logger("%s line %d (%s): Error destroying mutex: %s\n", - filename, lineno, func, strerror(res)); -#ifndef PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP - else - t->mutex = PTHREAD_MUTEX_INIT_VALUE; -#endif - t->file[0] = filename; - t->lineno[0] = lineno; - t->func[0] = func; - - return res; -} - -static inline int __ast_pthread_mutex_lock(const char *filename, int lineno, const char *func, - const char* mutex_name, ast_mutex_t *t) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - ast_mutex_init(t); - } -#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ - -#ifdef DETECT_DEADLOCKS - { - time_t seconds = time(NULL); - time_t current; - do { -#ifdef HAVE_MTX_PROFILE - ast_mark(mtx_prof, 1); -#endif - res = pthread_mutex_trylock(&t->mutex); -#ifdef HAVE_MTX_PROFILE - ast_mark(mtx_prof, 0); -#endif - if (res == EBUSY) { - current = time(NULL); - if ((current - seconds) && (!((current - seconds) % 5))) { - __ast_mutex_logger("%s line %d (%s): Deadlock? waited %d sec for mutex '%s'?\n", - filename, lineno, func, (int)(current - seconds), mutex_name); - __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], - t->func[t->reentrancy-1], mutex_name); - } - usleep(200); - } - } while (res == EBUSY); - } -#else -#ifdef HAVE_MTX_PROFILE - ast_mark(mtx_prof, 1); - res = pthread_mutex_trylock(&t->mutex); - ast_mark(mtx_prof, 0); - if (res) -#endif - res = pthread_mutex_lock(&t->mutex); -#endif /* DETECT_DEADLOCKS */ - - if (!res) { - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = filename; - t->lineno[t->reentrancy] = lineno; - t->func[t->reentrancy] = func; - t->thread[t->reentrancy] = pthread_self(); - t->reentrancy++; - } else { - __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", - filename, lineno, func, mutex_name); - } - } else { - __ast_mutex_logger("%s line %d (%s): Error obtaining mutex: %s\n", - filename, lineno, func, strerror(errno)); - DO_THREAD_CRASH; - } - - return res; -} - -static inline int __ast_pthread_mutex_trylock(const char *filename, int lineno, const char *func, - const char* mutex_name, ast_mutex_t *t) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - ast_mutex_init(t); - } -#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ - - if (!(res = pthread_mutex_trylock(&t->mutex))) { - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = filename; - t->lineno[t->reentrancy] = lineno; - t->func[t->reentrancy] = func; - t->thread[t->reentrancy] = pthread_self(); - t->reentrancy++; - } else { - __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", - filename, lineno, func, mutex_name); - } - } else { - __ast_mutex_logger("%s line %d (%s): Warning: '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); - } - - return res; -} - -static inline int __ast_pthread_mutex_unlock(const char *filename, int lineno, const char *func, - const char *mutex_name, ast_mutex_t *t) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - } -#endif - - if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { - __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", - filename, lineno, func, mutex_name); - __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); - DO_THREAD_CRASH; - } - - if (--t->reentrancy < 0) { - __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", - filename, lineno, func, mutex_name); - t->reentrancy = 0; - } - - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = NULL; - t->lineno[t->reentrancy] = 0; - t->func[t->reentrancy] = NULL; - t->thread[t->reentrancy] = 0; - } - - if ((res = pthread_mutex_unlock(&t->mutex))) { - __ast_mutex_logger("%s line %d (%s): Error releasing mutex: %s\n", - filename, lineno, func, strerror(res)); - DO_THREAD_CRASH; - } - - return res; -} - -static inline int __ast_cond_init(const char *filename, int lineno, const char *func, - const char *cond_name, ast_cond_t *cond, pthread_condattr_t *cond_attr) -{ - return pthread_cond_init(cond, cond_attr); -} - -static inline int __ast_cond_signal(const char *filename, int lineno, const char *func, - const char *cond_name, ast_cond_t *cond) -{ - return pthread_cond_signal(cond); -} - -static inline int __ast_cond_broadcast(const char *filename, int lineno, const char *func, - const char *cond_name, ast_cond_t *cond) -{ - return pthread_cond_broadcast(cond); -} - -static inline int __ast_cond_destroy(const char *filename, int lineno, const char *func, - const char *cond_name, ast_cond_t *cond) -{ - return pthread_cond_destroy(cond); -} - -static inline int __ast_cond_wait(const char *filename, int lineno, const char *func, - const char *cond_name, const char *mutex_name, - ast_cond_t *cond, ast_mutex_t *t) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - } -#endif - - if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { - __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", - filename, lineno, func, mutex_name); - __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); - DO_THREAD_CRASH; - } - - if (--t->reentrancy < 0) { - __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", - filename, lineno, func, mutex_name); - t->reentrancy = 0; - } - - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = NULL; - t->lineno[t->reentrancy] = 0; - t->func[t->reentrancy] = NULL; - t->thread[t->reentrancy] = 0; - } - - if ((res = pthread_cond_wait(cond, &t->mutex))) { - __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", - filename, lineno, func, strerror(res)); - DO_THREAD_CRASH; - } else { - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = filename; - t->lineno[t->reentrancy] = lineno; - t->func[t->reentrancy] = func; - t->thread[t->reentrancy] = pthread_self(); - t->reentrancy++; - } else { - __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", - filename, lineno, func, mutex_name); - } - } - - return res; -} - -static inline int __ast_cond_timedwait(const char *filename, int lineno, const char *func, - const char *cond_name, const char *mutex_name, ast_cond_t *cond, - ast_mutex_t *t, const struct timespec *abstime) -{ - int res; - int canlog = strcmp(filename, "logger.c"); - -#ifdef AST_MUTEX_INIT_W_CONSTRUCTORS - if ((t->mutex) == ((pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER)) { - __ast_mutex_logger("%s line %d (%s): Error: mutex '%s' is uninitialized.\n", - filename, lineno, func, mutex_name); - } -#endif - - if (t->reentrancy && (t->thread[t->reentrancy-1] != pthread_self())) { - __ast_mutex_logger("%s line %d (%s): attempted unlock mutex '%s' without owning it!\n", - filename, lineno, func, mutex_name); - __ast_mutex_logger("%s line %d (%s): '%s' was locked here.\n", - t->file[t->reentrancy-1], t->lineno[t->reentrancy-1], t->func[t->reentrancy-1], mutex_name); - DO_THREAD_CRASH; - } - - if (--t->reentrancy < 0) { - __ast_mutex_logger("%s line %d (%s): mutex '%s' freed more times than we've locked!\n", - filename, lineno, func, mutex_name); - t->reentrancy = 0; - } - - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = NULL; - t->lineno[t->reentrancy] = 0; - t->func[t->reentrancy] = NULL; - t->thread[t->reentrancy] = 0; - } - - if ((res = pthread_cond_timedwait(cond, &t->mutex, abstime)) && (res != ETIMEDOUT)) { - __ast_mutex_logger("%s line %d (%s): Error waiting on condition mutex '%s'\n", - filename, lineno, func, strerror(res)); - DO_THREAD_CRASH; - } else { - if (t->reentrancy < AST_MAX_REENTRANCY) { - t->file[t->reentrancy] = filename; - t->lineno[t->reentrancy] = lineno; - t->func[t->reentrancy] = func; - t->thread[t->reentrancy] = pthread_self(); - t->reentrancy++; - } else { - __ast_mutex_logger("%s line %d (%s): '%s' really deep reentrancy!\n", - filename, lineno, func, mutex_name); - } - } - - return res; -} - -#define ast_mutex_destroy(a) __ast_pthread_mutex_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) -#define ast_mutex_lock(a) __ast_pthread_mutex_lock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) -#define ast_mutex_unlock(a) __ast_pthread_mutex_unlock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) -#define ast_mutex_trylock(a) __ast_pthread_mutex_trylock(__FILE__, __LINE__, __PRETTY_FUNCTION__, #a, a) -#define ast_cond_init(cond, attr) __ast_cond_init(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond, attr) -#define ast_cond_destroy(cond) __ast_cond_destroy(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) -#define ast_cond_signal(cond) __ast_cond_signal(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) -#define ast_cond_broadcast(cond) __ast_cond_broadcast(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, cond) -#define ast_cond_wait(cond, mutex) __ast_cond_wait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex) -#define ast_cond_timedwait(cond, mutex, time) __ast_cond_timedwait(__FILE__, __LINE__, __PRETTY_FUNCTION__, #cond, #mutex, cond, mutex, time) - -#else /* !DEBUG_THREADS */ - - -typedef pthread_mutex_t ast_mutex_t; - -#define AST_MUTEX_INIT_VALUE ((ast_mutex_t) PTHREAD_MUTEX_INIT_VALUE) - -static inline int ast_mutex_init(ast_mutex_t *pmutex) -{ - pthread_mutexattr_t attr; - - pthread_mutexattr_init(&attr); - pthread_mutexattr_settype(&attr, AST_MUTEX_KIND); - - return pthread_mutex_init(pmutex, &attr); -} - -#define ast_pthread_mutex_init(pmutex,a) pthread_mutex_init(pmutex,a) - -static inline int ast_mutex_unlock(ast_mutex_t *pmutex) -{ - return pthread_mutex_unlock(pmutex); -} - -static inline int ast_mutex_destroy(ast_mutex_t *pmutex) -{ - return pthread_mutex_destroy(pmutex); -} - -static inline int ast_mutex_lock(ast_mutex_t *pmutex) -{ - __MTX_PROF(pmutex); -} - -static inline int ast_mutex_trylock(ast_mutex_t *pmutex) -{ - return pthread_mutex_trylock(pmutex); -} - -typedef pthread_cond_t ast_cond_t; - -static inline int ast_cond_init(ast_cond_t *cond, pthread_condattr_t *cond_attr) -{ - return pthread_cond_init(cond, cond_attr); -} - -static inline int ast_cond_signal(ast_cond_t *cond) -{ - return pthread_cond_signal(cond); -} - -static inline int ast_cond_broadcast(ast_cond_t *cond) -{ - return pthread_cond_broadcast(cond); -} - -static inline int ast_cond_destroy(ast_cond_t *cond) -{ - return pthread_cond_destroy(cond); -} - -static inline int ast_cond_wait(ast_cond_t *cond, ast_mutex_t *t) -{ - return pthread_cond_wait(cond, t); -} - -static inline int ast_cond_timedwait(ast_cond_t *cond, ast_mutex_t *t, const struct timespec *abstime) -{ - return pthread_cond_timedwait(cond, t, abstime); -} - -#endif /* !DEBUG_THREADS */ - -#if defined(AST_MUTEX_INIT_W_CONSTRUCTORS) -/* If AST_MUTEX_INIT_W_CONSTRUCTORS is defined, use file scope - constructors/destructors to create/destroy mutexes. */ -#define __AST_MUTEX_DEFINE(scope, mutex) \ - scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE; \ -static void __attribute__ ((constructor)) init_##mutex(void) \ -{ \ - ast_mutex_init(&mutex); \ -} \ -static void __attribute__ ((destructor)) fini_##mutex(void) \ -{ \ - ast_mutex_destroy(&mutex); \ -} -#else /* !AST_MUTEX_INIT_W_CONSTRUCTORS */ -/* By default, use static initialization of mutexes. */ -#define __AST_MUTEX_DEFINE(scope, mutex) \ - scope ast_mutex_t mutex = AST_MUTEX_INIT_VALUE -#endif /* AST_MUTEX_INIT_W_CONSTRUCTORS */ - -#define pthread_mutex_t use_ast_mutex_t_instead_of_pthread_mutex_t -#define pthread_mutex_lock use_ast_mutex_lock_instead_of_pthread_mutex_lock -#define pthread_mutex_unlock use_ast_mutex_unlock_instead_of_pthread_mutex_unlock -#define pthread_mutex_trylock use_ast_mutex_trylock_instead_of_pthread_mutex_trylock -#define pthread_mutex_init use_ast_mutex_init_instead_of_pthread_mutex_init -#define pthread_mutex_destroy use_ast_mutex_destroy_instead_of_pthread_mutex_destroy -#define pthread_cond_t use_ast_cond_t_instead_of_pthread_cond_t -#define pthread_cond_init use_ast_cond_init_instead_of_pthread_cond_init -#define pthread_cond_destroy use_ast_cond_destroy_instead_of_pthread_cond_destroy -#define pthread_cond_signal use_ast_cond_signal_instead_of_pthread_cond_signal -#define pthread_cond_broadcast use_ast_cond_broadcast_instead_of_pthread_cond_broadcast -#define pthread_cond_wait use_ast_cond_wait_instead_of_pthread_cond_wait -#define pthread_cond_timedwait use_ast_cond_timedwait_instead_of_pthread_cond_timedwait - -#define AST_MUTEX_DEFINE_STATIC(mutex) __AST_MUTEX_DEFINE(static, mutex) - -#define AST_MUTEX_INITIALIZER __use_AST_MUTEX_DEFINE_STATIC_rather_than_AST_MUTEX_INITIALIZER__ - -#define gethostbyname __gethostbyname__is__not__reentrant__use__ast_gethostbyname__instead__ - -#ifndef __linux__ -#define pthread_create __use_ast_pthread_create_instead__ -#endif - -typedef pthread_rwlock_t ast_rwlock_t; - -static inline int ast_rwlock_init(ast_rwlock_t *prwlock) -{ - pthread_rwlockattr_t attr; - - pthread_rwlockattr_init(&attr); - -#ifdef HAVE_PTHREAD_RWLOCK_PREFER_WRITER_NP - pthread_rwlockattr_setkind_np(&attr, PTHREAD_RWLOCK_PREFER_WRITER_NP); -#endif - - return pthread_rwlock_init(prwlock, &attr); -} - -static inline int ast_rwlock_destroy(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_destroy(prwlock); -} - -static inline int ast_rwlock_unlock(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_unlock(prwlock); -} - -static inline int ast_rwlock_rdlock(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_rdlock(prwlock); -} - -static inline int ast_rwlock_tryrdlock(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_tryrdlock(prwlock); -} - -static inline int ast_rwlock_wrlock(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_wrlock(prwlock); -} - -static inline int ast_rwlock_trywrlock(ast_rwlock_t *prwlock) -{ - return pthread_rwlock_trywrlock(prwlock); -} - -/* Statically declared read/write locks */ - -#ifndef HAVE_PTHREAD_RWLOCK_INITIALIZER -#define __AST_RWLOCK_DEFINE(scope, rwlock) \ - scope ast_rwlock_t rwlock; \ -static void __attribute__ ((constructor)) init_##rwlock(void) \ -{ \ - ast_rwlock_init(&rwlock); \ -} \ -static void __attribute__ ((destructor)) fini_##rwlock(void) \ -{ \ - ast_rwlock_destroy(&rwlock); \ -} -#else -#define AST_RWLOCK_INIT_VALUE PTHREAD_RWLOCK_INITIALIZER -#define __AST_RWLOCK_DEFINE(scope, rwlock) \ - scope ast_rwlock_t rwlock = AST_RWLOCK_INIT_VALUE -#endif - -#define AST_RWLOCK_DEFINE_STATIC(rwlock) __AST_RWLOCK_DEFINE(static, rwlock) - -/* - * Initial support for atomic instructions. - * For platforms that have it, use the native cpu instruction to - * implement them. For other platforms, resort to a 'slow' version - * (defined in utils.c) that protects the atomic instruction with - * a single lock. - * The slow versions is always available, for testing purposes, - * as ast_atomic_fetchadd_int_slow() - */ - -#if defined(HAVE_OSX_ATOMICS) -#include "libkern/OSAtomic.h" -#endif - -/*! \brief Atomically add v to *p and return * the previous value of *p. - * This can be used to handle reference counts, and the return value - * can be used to generate unique identifiers. - */ - -#if defined(HAVE_GCC_ATOMICS) -AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), -{ - return __sync_fetch_and_add(p, v); -}) -#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4) -AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), -{ - return OSAtomicAdd32(v, (int32_t *) p); -}) -#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8) -AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), -{ - return OSAtomicAdd64(v, (int64_t *) p); -#elif defined (__i386__) || defined(__x86_64__) -AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), -{ - __asm __volatile ( - " lock xaddl %0, %1 ; " - : "+r" (v), /* 0 (result) */ - "=m" (*p) /* 1 */ - : "m" (*p)); /* 2 */ - return (v); -}) -#else -static int ast_atomic_fetchadd_int_slow(volatile int *p, int v) -{ - int ret; - ret = *p; - *p += v; - return ret; -} -AST_INLINE_API(int ast_atomic_fetchadd_int(volatile int *p, int v), -{ - return ast_atomic_fetchadd_int_slow(p, v); -}) -#endif - -/*! \brief decrement *p by 1 and return true if the variable has reached 0. - * Useful e.g. to check if a refcount has reached 0. - */ -#if defined(HAVE_GCC_ATOMICS) -AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), -{ - return __sync_sub_and_fetch(p, 1) == 0; -}) -#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 4) -AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), -{ - return OSAtomicAdd32( -1, (int32_t *) p) == 0; -}) -#elif defined(HAVE_OSX_ATOMICS) && (SIZEOF_INT == 8) -AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), -{ - return OSAtomicAdd64( -1, (int64_t *) p) == 0; -#else -AST_INLINE_API(int ast_atomic_dec_and_test(volatile int *p), -{ - int a = ast_atomic_fetchadd_int(p, -1); - return a == 1; /* true if the value is 0 now (so it was 1 previously) */ -}) -#endif - -#ifndef DEBUG_CHANNEL_LOCKS -/*! \brief Lock a channel. If DEBUG_CHANNEL_LOCKS is defined - in the Makefile, print relevant output for debugging */ -#define ast_channel_lock(x) ast_mutex_lock(&x->lock) -/*! \brief Unlock a channel. If DEBUG_CHANNEL_LOCKS is defined - in the Makefile, print relevant output for debugging */ -#define ast_channel_unlock(x) ast_mutex_unlock(&x->lock) -/*! \brief Try locking a channel. If DEBUG_CHANNEL_LOCKS is defined - in the Makefile, print relevant output for debugging */ -#define ast_channel_trylock(x) ast_mutex_trylock(&x->lock) -#else - -/*! \brief Lock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ -int ast_channel_lock(struct ast_channel *chan); - -/*! \brief Unlock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function -*/ -int ast_channel_unlock(struct ast_channel *chan); - -/*! \brief Lock AST channel (and print debugging output) -\note You need to enable DEBUG_CHANNEL_LOCKS for this function */ -int ast_channel_trylock(struct ast_channel *chan); -#endif - - /* linkedlists.h */ #define AST_LIST_LOCK(head) \ |