diff options
Diffstat (limited to 'src/server/signal.h')
-rw-r--r-- | src/server/signal.h | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/src/server/signal.h b/src/server/signal.h new file mode 100644 index 0000000..0504274 --- /dev/null +++ b/src/server/signal.h @@ -0,0 +1,42 @@ +#ifndef _SIGNAL_H_ +#define _SIGNAL_H_ + +#define SIGNAL_OK (0) +#define SIGNAL_TIMEOUT (-2) +#define SIGNAL_ERROR (-1) + +/** + * Create a new signal fd (eventfd), nonblocking. + * @return >= 0 on success, which is the fd; < 0 on error + */ +int signal_new(); + +/** + * Trigger the given signal, so a wait or clear call will succeed. + * @return SIGNAL_OK on success, SIGNAL_ERROR on error + */ +int signal_call(int signalFd); + +/** + * Wait for given signal, with an optional timeout. + * If timeout == 0, wait forever. + * @return > 0 telling how many times the signal was called, + * SIGNAL_TIMEOUT if the timeout was reached, + * SIGNAL_ERROR if some error occured + */ +int signal_wait(int signalFd, int timeoutMs); + +/** + * Clears any pending signals on this signal fd. + * @return number of signals that were pending, + * SIGNAL_ERROR if some error occured + */ +int signal_clear(int signalFd); + +/** + * Close the given signal. + */ +void signal_close(int signalFd); + +#endif + |