Set a timeout
#include <sys/iofunc.h> #include <sys/dispatch.h> int dispatch_timeout( dispatch_t *dpp, struct timespec *reltime );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The function dispatch_timeout() sets a timeout that's used when blocking with dispatch_block().
This function is part of the dispatch layer of a resource manager. For more information, see Layers in a resource manager in the Bones of a Resource Manager chapter of Writing a Resource Manager.
This affects all future calls to dispatch_block() with the same dispatch handle, unlike the similar TimerTimeout() and timer_timeout() calls, which affect only the next blocking call.
int my_handler_func( dispatch_context_t *ctp ) { if ( ctp->message_context->rcvid == -1 ) { return my_handle_unblock(ctp); } else { return dispatch_handler(ctp); } }
#include <sys/dispatch.h> #include <time.h> #include <stdio.h> #include <stdlib.h> int main( int argc, char **argv ) { dispatch_t *dpp; struct timespec time_out; int timedout; time_out.tv_sec = 1; time_out.tv_nsec = 2; if( ( dpp = dispatch_create() ) == NULL ) { fprintf( stderr, "%s: Unable to allocate \ dispatch handle.\n",argv[0] ); return EXIT_FAILURE; } … if ( (timedout = dispatch_timeout ( dpp, &time_out )) == -1 ) { fprintf ( stderr, "Couldn't set timeout ); return EXIT_FAILURE; } /* else successful timeout set */ … return EXIT_SUCCESS; }
For examples using the dispatch interface, see dispatch_create(), message_attach(), resmgr_attach(), and thread_pool_create().
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | No |
Signal handler | No |
Thread | No |