Handle resource manager messages
#include <sys/iofunc.h> #include <sys/dispatch.h> int resmgr_handler( resmgr_context_t * ctp );
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The resmgr_handler() function handles the message received in ctp. This function handles different I/O messages through the resource manager framework.
The resmgr_handler() function is a special case of dispatch_handler(). You should use it only when writing a simple resource manager i.e. where there's no need to attach pulses or messages. |
#include <sys/dispatch.h> #include <stdio.h> #include <stdlib.h> int main( int argc, char **argv ) { dispatch_t *dpp; resmgr_context_t *ctp; if ((dpp = dispatch_create()) == NULL) { fprintf( stderr, "%s: Unable to allocate \ dispatch handle.\n",argv[0] ); return EXIT_FAILURE; } … ctp = resmgr_context_alloc( dpp ); while (1) { if ( ( ctp = resmgr_block( ctp )) == NULL ) { fprintf( stderr, "block error\n" ); return EXIT_FAILURE; } resmgr_handler( ctp ); } }
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 |
If you attach messages or pulses to dpp by calling message_attach(), pulse_attach(), or select_attach(), those events aren't dispatched by resmgr_handler(). Instead, you should call dispatch_handler().
dispatch_handler(), resmgr_attach(), resmgr_block()
“Layers in a resource manager” in the Bones of a Resource Manager chapter of Writing a Resource Manager
Resource Managers chapter of Getting Started with QNX Neutrino