Mercurial > dovecot > original-hg > dovecot-1.2
view src/lib/ioloop.h @ 9565:7c447e8c24fe HEAD
maildir: If we detect MH as the cause of unexpunging, log it in the error message.
author | Timo Sirainen <tss@iki.fi> |
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date | Thu, 29 Apr 2010 20:43:16 +0300 |
parents | 86c28d14ddeb |
children |
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#ifndef IOLOOP_H #define IOLOOP_H #include <sys/time.h> #include <time.h> struct io; struct timeout; struct ioloop; enum io_condition { IO_READ = 0x01, IO_WRITE = 0x02, /* IO_ERROR can be used to check when writable pipe's reader side closes the pipe. For other uses IO_READ should work just as well. */ IO_ERROR = 0x04, /* internal */ IO_NOTIFY = 0x08 }; enum io_notify_result { /* Notify added successfully */ IO_NOTIFY_ADDED, /* Specified file doesn't exist, can't wait on it */ IO_NOTIFY_NOTFOUND, /* Can't add notify for specified file. Main reasons for this: a) No notify support at all, b) Only directory notifies supported */ IO_NOTIFY_NOSUPPORT }; typedef void io_callback_t(void *context); typedef void timeout_callback_t(void *context); /* Time when the I/O loop started calling handlers. Can be used instead of time(NULL). */ extern time_t ioloop_time; extern struct timeval ioloop_timeval; extern struct timezone ioloop_timezone; extern struct ioloop *current_ioloop; /* You can create different handlers for IO_READ and IO_WRITE. IO_READ and IO_ERROR can't use different handlers (and there's no point anyway). Don't try to add multiple handlers for the same type. It's not checked and the behavior will be undefined. */ struct io *io_add(int fd, enum io_condition condition, io_callback_t *callback, void *context); #define io_add(fd, condition, callback, context) \ CONTEXT_CALLBACK(io_add, io_callback_t, \ callback, context, fd, condition) enum io_notify_result io_add_notify(const char *path, io_callback_t *callback, void *context, struct io **io_r); #ifdef CONTEXT_TYPE_SAFETY # define io_add_notify(path, callback, context, io_r) \ ({(void)(1 ? 0 : callback(context)); \ io_add_notify(path, (io_callback_t *)callback, context, io_r); }) #else # define io_add_notify(path, callback, context, io_r) \ io_add_notify(path, (io_callback_t *)callback, context, io_r) #endif /* Remove I/O handler, and set io pointer to NULL. */ void io_remove(struct io **io); /* Like io_remove(), but assume that the file descriptor is already closed. With some backends this simply frees the memory. */ void io_remove_closed(struct io **io); /* Timeout handlers */ struct timeout *timeout_add(unsigned int msecs, timeout_callback_t *callback, void *context); #define timeout_add(msecs, callback, context) \ CONTEXT_CALLBACK(timeout_add, timeout_callback_t, \ callback, context, msecs) /* Remove timeout handler, and set timeout pointer to NULL. */ void timeout_remove(struct timeout **timeout); /* Reset timeout so it's next run after now+msecs. */ void timeout_reset(struct timeout *timeout); void io_loop_run(struct ioloop *ioloop); void io_loop_stop(struct ioloop *ioloop); /* safe to run in signal handler */ bool io_loop_is_running(struct ioloop *ioloop); /* call these if you wish to run the iteration only once */ void io_loop_set_running(struct ioloop *ioloop); void io_loop_handler_run(struct ioloop *ioloop); struct ioloop *io_loop_create(void); /* Specify the maximum number of fds we're expecting to use. */ void io_loop_set_max_fd_count(struct ioloop *ioloop, unsigned int max_fds); /* Destroy I/O loop and set ioloop pointer to NULL. */ void io_loop_destroy(struct ioloop **ioloop); /* Change the current_ioloop. */ void io_loop_set_current(struct ioloop *ioloop); #endif