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authorPaolo Bonzini <pbonzini@redhat.com>2011-03-12 17:43:52 +0100
committerBlue Swirl <blauwirbel@gmail.com>2011-03-13 14:44:21 +0000
commit9257d46d55f1fe4e8209be9a6870e339ac3266fe (patch)
tree097b8459e69df0da2b17fcd67d44c84fdfc2de63 /qemu-thread-posix.c
parentb7680cb6078bd7294a3dd86473d3f2fdee991dd0 (diff)
add win32 qemu-thread implementation
For now, qemu_cond_timedwait and qemu_mutex_timedlock are left as POSIX-only functions. They can be removed later, once the patches that remove their uses are in. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'qemu-thread-posix.c')
-rw-r--r--qemu-thread-posix.c192
1 files changed, 192 insertions, 0 deletions
diff --git a/qemu-thread-posix.c b/qemu-thread-posix.c
new file mode 100644
index 000000000..e3077733f
--- /dev/null
+++ b/qemu-thread-posix.c
@@ -0,0 +1,192 @@
+/*
+ * Wrappers around mutex/cond/thread functions
+ *
+ * Copyright Red Hat, Inc. 2009
+ *
+ * Author:
+ * Marcelo Tosatti <mtosatti@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+#include <signal.h>
+#include <stdint.h>
+#include <string.h>
+#include "qemu-thread.h"
+
+static void error_exit(int err, const char *msg)
+{
+ fprintf(stderr, "qemu: %s: %s\n", msg, strerror(err));
+ exit(1);
+}
+
+void qemu_mutex_init(QemuMutex *mutex)
+{
+ int err;
+
+ err = pthread_mutex_init(&mutex->lock, NULL);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_mutex_destroy(QemuMutex *mutex)
+{
+ int err;
+
+ err = pthread_mutex_destroy(&mutex->lock);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_mutex_lock(QemuMutex *mutex)
+{
+ int err;
+
+ err = pthread_mutex_lock(&mutex->lock);
+ if (err)
+ error_exit(err, __func__);
+}
+
+int qemu_mutex_trylock(QemuMutex *mutex)
+{
+ return pthread_mutex_trylock(&mutex->lock);
+}
+
+static void timespec_add_ms(struct timespec *ts, uint64_t msecs)
+{
+ ts->tv_sec = ts->tv_sec + (long)(msecs / 1000);
+ ts->tv_nsec = (ts->tv_nsec + ((long)msecs % 1000) * 1000000);
+ if (ts->tv_nsec >= 1000000000) {
+ ts->tv_nsec -= 1000000000;
+ ts->tv_sec++;
+ }
+}
+
+int qemu_mutex_timedlock(QemuMutex *mutex, uint64_t msecs)
+{
+ int err;
+ struct timespec ts;
+
+ clock_gettime(CLOCK_REALTIME, &ts);
+ timespec_add_ms(&ts, msecs);
+
+ err = pthread_mutex_timedlock(&mutex->lock, &ts);
+ if (err && err != ETIMEDOUT)
+ error_exit(err, __func__);
+ return err;
+}
+
+void qemu_mutex_unlock(QemuMutex *mutex)
+{
+ int err;
+
+ err = pthread_mutex_unlock(&mutex->lock);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_cond_init(QemuCond *cond)
+{
+ int err;
+
+ err = pthread_cond_init(&cond->cond, NULL);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_cond_destroy(QemuCond *cond)
+{
+ int err;
+
+ err = pthread_cond_destroy(&cond->cond);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_cond_signal(QemuCond *cond)
+{
+ int err;
+
+ err = pthread_cond_signal(&cond->cond);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_cond_broadcast(QemuCond *cond)
+{
+ int err;
+
+ err = pthread_cond_broadcast(&cond->cond);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_cond_wait(QemuCond *cond, QemuMutex *mutex)
+{
+ int err;
+
+ err = pthread_cond_wait(&cond->cond, &mutex->lock);
+ if (err)
+ error_exit(err, __func__);
+}
+
+int qemu_cond_timedwait(QemuCond *cond, QemuMutex *mutex, uint64_t msecs)
+{
+ struct timespec ts;
+ int err;
+
+ clock_gettime(CLOCK_REALTIME, &ts);
+ timespec_add_ms(&ts, msecs);
+
+ err = pthread_cond_timedwait(&cond->cond, &mutex->lock, &ts);
+ if (err && err != ETIMEDOUT)
+ error_exit(err, __func__);
+ return err;
+}
+
+void qemu_thread_create(QemuThread *thread,
+ void *(*start_routine)(void*),
+ void *arg)
+{
+ int err;
+
+ /* Leave signal handling to the iothread. */
+ sigset_t set, oldset;
+
+ sigfillset(&set);
+ pthread_sigmask(SIG_SETMASK, &set, &oldset);
+ err = pthread_create(&thread->thread, NULL, start_routine, arg);
+ if (err)
+ error_exit(err, __func__);
+
+ pthread_sigmask(SIG_SETMASK, &oldset, NULL);
+}
+
+void qemu_thread_signal(QemuThread *thread, int sig)
+{
+ int err;
+
+ err = pthread_kill(thread->thread, sig);
+ if (err)
+ error_exit(err, __func__);
+}
+
+void qemu_thread_get_self(QemuThread *thread)
+{
+ thread->thread = pthread_self();
+}
+
+int qemu_thread_is_self(QemuThread *thread)
+{
+ return pthread_equal(pthread_self(), thread->thread);
+}
+
+void qemu_thread_exit(void *retval)
+{
+ pthread_exit(retval);
+}