From ee1de6a067c70fbd8cb73facd64c3b0b275f9f83 Mon Sep 17 00:00:00 2001 From: deischen Date: Wed, 24 Jan 2001 13:03:38 +0000 Subject: Add weak definitions for wrapped system calls. In general: _foo - wrapped system call foo - weak definition to _foo and for cancellation points: _foo - wrapped system call __foo - enter cancellation point, call _foo(), leave cancellation point foo - weak definition to __foo Change use of global _thread_run to call a function to get the currently running thread. Make all pthread_foo functions weak definitions to _pthread_foo, where _pthread_foo is the implementation. This allows an application to provide its own pthread functions. Provide slightly different versions of pthread_mutex_lock and pthread_mutex_init so that we can tell the difference between a libc mutex and an application mutex. Threads holding mutexes internal to libc should never be allowed to exit, call signal handlers, or cancel. Approved by: -arch --- lib/libpthread/thread/thr_gc.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'lib/libpthread/thread/thr_gc.c') diff --git a/lib/libpthread/thread/thr_gc.c b/lib/libpthread/thread/thr_gc.c index a81ea91..cdc9681 100644 --- a/lib/libpthread/thread/thr_gc.c +++ b/lib/libpthread/thread/thr_gc.c @@ -47,6 +47,7 @@ pthread_addr_t _thread_gc(pthread_addr_t arg) { + struct pthread *curthread = _get_curthread(); int f_debug; int f_done = 0; int ret; @@ -61,13 +62,13 @@ _thread_gc(pthread_addr_t arg) pthread_sigmask(SIG_BLOCK, &mask, NULL); /* Mark this thread as a library thread (not a user thread). */ - _thread_run->flags |= PTHREAD_FLAGS_PRIVATE; + curthread->flags |= PTHREAD_FLAGS_PRIVATE; /* Set a debug flag based on an environment variable. */ f_debug = (getenv("LIBC_R_DEBUG") != NULL); /* Set the name of this thread. */ - pthread_set_name_np(_thread_run,"GC"); + pthread_set_name_np(curthread,"GC"); while (!f_done) { /* Check if debugging this application. */ @@ -82,8 +83,8 @@ _thread_gc(pthread_addr_t arg) _thread_kern_sig_defer(); /* Check if this is the last running thread: */ - if (TAILQ_FIRST(&_thread_list) == _thread_run && - TAILQ_NEXT(_thread_run, tle) == NULL) + if (TAILQ_FIRST(&_thread_list) == curthread && + TAILQ_NEXT(curthread, tle) == NULL) /* * This is the last thread, so it can exit * now. -- cgit v1.1