Detach a file descriptor from a dispatch handle
#include <sys/iofunc.h> #include <sys/dispatch.h> int select_detach( void *dpp, int fd );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The select_detach() function detaches the file descriptor fd that was registered with dispatch dpp, using select_attach().
#include <sys/dispatch.h> #include <stdio.h> #include <stdlib.h> #include <fcntl.h> int my_func( … ) { … } int main( int argc, char **argv ) { dispatch_t *dpp; int fd; if( ( dpp = dispatch_create() ) == NULL ) { fprintf( stderr, "%s: Unable to allocate \ dispatch handle.\n",argv[0] ); return EXIT_FAILURE; } if( argc <= 2 || ( fd = open( argv[1], O_RDWR | O_NONBLOCK )) == -1 ) { exit(0); } select_attach( dpp, NULL, fd, SELECT_FLAG_READ | SELECT_FLAG_REARM, my_func, NULL ); … if ( (select_detach( dpp, fd )) == -1 ) { fprintf( stderr, "Failed to detach \ the file descriptor.\n" ); return 1; } }
For examples using the dispatch interface, see dispatch_create(), message_attach(), resmgr_attach(), and thread_pool_create().
Safety: | |
---|---|
Cancellation point | Yes |
Interrupt handler | No |
Signal handler | No |
Thread | Yes |