diff options
Diffstat (limited to 'cleanup.c')
| -rw-r--r-- | cleanup.c | 135 |
1 files changed, 135 insertions, 0 deletions
@@ -12,6 +12,139 @@ #include "pthread.h" #include "implement.h" +/* + * Code contributed by John E. Bossom <JEB>. + */ + +_pthread_cleanup_t * +_pthread_pop_cleanup (int execute) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function pops the most recently pushed cleanup + * handler. If execute is nonzero, then the cleanup handler + * is executed if non-null. + * + * PARAMETERS + * execute + * if nonzero, execute the cleanup handler + * + * + * DESCRIPTION + * This function pops the most recently pushed cleanup + * handler. If execute is nonzero, then the cleanup handler + * is executed if non-null. + * NOTE: specify 'execute' as nonzero to avoid duplication + * of common cleanup code. + * + * RESULTS + * N/A + * + * ------------------------------------------------------ + */ +{ + _pthread_cleanup_t *cleanup; + + cleanup = pthread_getspecific (_pthread_cleanupKey); + + if (cleanup != NULL) + { + if (execute && (cleanup->routine != NULL)) + { + +#ifdef _WIN32 + + __try + { + /* + * Run the caller's cleanup routine. + */ + (*cleanup->routine) (cleanup->arg); + } + __except (EXCEPTION_EXECUTE_HANDLER) + { + /* + * A system unexpected exception had occurred + * running the user's cleanup routine. + * We get control back within this block. + */ + } + } + +#else + + /* + * Run the caller's cleanup routine. + */ + (*cleanup->routine) (cleanup->arg); + +#endif /* _WIN32 */ + + pthread_setspecific (_pthread_cleanupKey, cleanup->prev); + } + + return (cleanup); + +} /* _pthread_pop_cleanup */ + + +void +_pthread_push_cleanup (_pthread_cleanup_t * cleanup, + void (*routine) (void *), + void *arg) + /* + * ------------------------------------------------------ + * DOCPUBLIC + * This function pushes a new cleanup handler onto the thread's stack + * of cleanup handlers. Each cleanup handler pushed onto the stack is + * popped and invoked with the argument 'arg' when + * a) the thread exits by calling 'pthread_exit', + * b) when the thread acts on a cancellation request, + * c) or when the thrad calls pthread_cleanup_pop with a nonzero + * 'execute' argument + * + * PARAMETERS + * cleanup + * a pointer to an instance of pthread_cleanup_t, + * + * routine + * pointer to a cleanup handler, + * + * arg + * parameter to be passed to the cleanup handler + * + * + * DESCRIPTION + * This function pushes a new cleanup handler onto the thread's stack + * of cleanup handlers. Each cleanup handler pushed onto the stack is + * popped and invoked with the argument 'arg' when + * a) the thread exits by calling 'pthread_exit', + * b) when the thread acts on a cancellation request, + * c) or when the thrad calls pthread_cleanup_pop with a nonzero + * 'execute' argument + * NOTE: pthread_push_cleanup, pthread_pop_cleanup must be paired + * in the same lexical scope. + * + * RESULTS + * pthread_cleanup_t * + * pointer to the previous cleanup + * + * ------------------------------------------------------ + */ +{ + cleanup->routine = routine; + cleanup->arg = arg; + cleanup->prev = pthread_getspecific (_pthread_cleanupKey); + + pthread_setspecific (_pthread_cleanupKey, (void *) cleanup); + +} /* _pthread_push_cleanup */ + +/* </JEB> */ + + +#if 0 /* Pre Bossom */ + int _pthread_handler_push(int stack, int poporder, @@ -214,3 +347,5 @@ _pthread_destructor_run_all() break; } } + +#endif /* Pre Bossom */ |