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author | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 1999-10-27 00:56:38 +0000 |
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committer | markster <markster@f38db490-d61c-443f-a65b-d21fe96a405b> | 1999-10-27 00:56:38 +0000 |
commit | a561260fdab6fed8b474e89f797c0e64eefc4684 (patch) | |
tree | 60333681c40ddcaf6a39c782d713d94143aaa6b7 /include/asterisk/io.h | |
parent | 43ddba956a94b7316dd0b3fdb031b2e1b794941a (diff) |
Version 0.1.0 from FTP
git-svn-id: http://svn.digium.com/svn/asterisk/trunk@10 f38db490-d61c-443f-a65b-d21fe96a405b
Diffstat (limited to 'include/asterisk/io.h')
-rwxr-xr-x | include/asterisk/io.h | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/include/asterisk/io.h b/include/asterisk/io.h new file mode 100755 index 000000000..64d039a51 --- /dev/null +++ b/include/asterisk/io.h @@ -0,0 +1,85 @@ +/* + * Asterisk + * + * Mark Spencer <markster@marko.net> + * + * Copyright(C) 1999, Adtran, Inc. + * + * Distributed under the terms of the GNU General Public License (GPL) Version 2 + * + * I/O Managment (derived from Cheops-NG) + * + */ + +#ifndef _IO_H +#define _IO_H + +#include <sys/poll.h> /* For POLL* constants */ + +#if defined(__cplusplus) || defined(c_plusplus) +extern "C" { +#endif + +#define AST_IO_IN POLLIN /* Input ready */ +#define AST_IO_OUT POLLOUT /* Output ready */ +#define AST_IO_PRI POLLPRI /* Priority input ready */ + +/* Implicitly polled for */ +#define AST_IO_ERR POLLERR /* Error condition (errno or getsockopt) */ +#define AST_IO_HUP POLLHUP /* Hangup */ +#define AST_IO_NVAL POLLNVAL /* Invalid fd */ + +/* + * An Asterisk IO callback takes its id, a file descriptor, list of events, and + * callback data as arguments and returns 0 if it should not be + * run again, or non-zero if it should be run again. + */ + +struct io_context; + +/* Create a context for I/O operations */ +struct io_context *io_context_create(); + +/* Destroy a context for I/O operations */ +void io_context_destroy(struct io_context *ioc); + +typedef int (*ast_io_cb)(int *id, int fd, short events, void *cbdata); +#define AST_IO_CB(a) ((ast_io_cb)(a)) + +/* + * Watch for any of revents activites on fd, calling callback with data as + * callback data. Returns a pointer to ID of the IO event, or NULL on failure. + */ +extern int *ast_io_add(struct io_context *ioc, int fd, ast_io_cb callback, short events, void *data); + +/* + * Change an i/o handler, updating fd if > -1, callback if non-null, and revents + * if >-1, and data if non-null. Returns a pointero to the ID of the IO event, + * or NULL on failure. + */ +extern int *ast_io_change(struct io_context *ioc, int *id, int fd, ast_io_cb callback, short events, void *data); + +/* + * Remove an I/O id from consideration Returns 0 on success or -1 on failure. + */ +extern int ast_io_remove(struct io_context *ioc, int *id); + +/* + * Wait for I/O to happen, returning after + * howlong milliseconds, and after processing + * any necessary I/O. Returns the number of + * I/O events which took place. + */ +extern int ast_io_wait(struct io_context *ioc, int howlong); + +/* + * Debugging: Dump everything in the I/O array + */ +extern void ast_io_dump(struct io_context *ioc); + +#if defined(__cplusplus) || defined(c_plusplus) +} +#endif + + +#endif |