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Update.

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1998-08-26 15:46  Ulrich Drepper  <drepper@cygnus.com>

	* internals.h: Define THREAD_GETMEM and THREAD_SETMEM to default if
	not already defined.
	(struct _pthread_descr_struct): Add p_self and p_nr field.
	* manager.c (__pthread_handles): Define second element to point
	to manager thread.
	(__pthread_handles_num): Initialize to 2.
	(__pthread_manager): Use INIT_THREAD_SELF with two arguments.
	(pthread_start_thread): Likewise.
	(pthread_handle_create): Start search for free slot at entry 2.
	Initialize new fields p_self and p_nr.
	Call __clone with CLONE_PTRACE if available.
	(pthread_free): Call FREE_THREAD_SELF if available.
	* pthread.c (__pthread_initial_thread): Initialize new fields.
	(__pthread_manager_thread): Likewise.
	(__pthread_initialize_manager): Call __clone with CLONE_PTRACE.

	* cancel.c: Use THREAD_GETMEM and THREAD_SETMEM to access the
	elements of the thread descriptor.
	* condvar.c: Likewise.
	* errno.c: Likewise.
	* join.c: Likewise.
	* manager.c: Likewise.
	* pthread.c: Likewise.
	* ptlongjmp.c: Likewise.
	* semaphore.c: Likewise.
	* signals.c: Likewise.
	* specific.c: Likewise.
	* spinlock.c: Likewise.

	* sysdeps/alpha/pt-machine.h (INIT_THREAD_SELF): Add extra parameter.

	* sysdeps/i386/useldt.h: New file.
	* sysdeps/i386/i686/pt-machine.h: Show how to use this file.

	* sysdeps/sparc/sparc32/pt-machine.h: Define THREAD_GETMEM and
	THREAD_SETMEM using __thread_self.
	* sysdeps/sparc/sparc64/pt-machine.h: Likewise.
This commit is contained in:
Ulrich Drepper
1998-08-26 16:00:46 +00:00
parent 08cac4ac19
commit 00a2f9aa41
19 changed files with 369 additions and 113 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
linuxthreads/signals.c
View File

@@ -76,17 +76,19 @@ static void pthread_sighandler(int signo)
char * in_sighandler;
/* If we're in a sigwait operation, just record the signal received
and return without calling the user's handler */
if (self->p_sigwaiting) {
self->p_sigwaiting = 0;
self->p_signal = signo;
if (THREAD_GETMEM(self, p_sigwaiting)) {
THREAD_SETMEM(self, p_sigwaiting, 0);
THREAD_SETMEM(self, p_signal, signo);
return;
}
/* Record that we're in a signal handler and call the user's
handler function */
in_sighandler = self->p_in_sighandler;
if (in_sighandler == NULL) self->p_in_sighandler = CURRENT_STACK_FRAME;
in_sighandler = THREAD_GETMEM(self, p_in_sighandler);
if (in_sighandler == NULL)
THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME);
sighandler[signo](signo);
if (in_sighandler == NULL) self->p_in_sighandler = NULL;
if (in_sighandler == NULL)
THREAD_SETMEM(self, p_in_sighandler, NULL);
}
int sigaction(int sig, const struct sigaction * act,
@@ -131,21 +133,22 @@ int sigwait(const sigset_t * set, int * sig)
}
/* Test for cancellation */
if (sigsetjmp(jmpbuf, 1) == 0) {
self->p_cancel_jmp = &jmpbuf;
if (! (self->p_canceled && self->p_cancelstate == PTHREAD_CANCEL_ENABLE)) {
THREAD_SETMEM(self, p_cancel_jmp, &jmpbuf);
if (! (THREAD_GETMEM(self, p_canceled)
&& THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) {
/* Reset the signal count */
self->p_signal = 0;
THREAD_SETMEM(self, p_signal, 0);
/* Say we're in sigwait */
self->p_sigwaiting = 1;
THREAD_SETMEM(self, p_sigwaiting, 1);
/* Unblock the signals and wait for them */
sigsuspend(&mask);
}
}
self->p_cancel_jmp = NULL;
THREAD_SETMEM(self, p_cancel_jmp, NULL);
/* The signals are now reblocked. Check for cancellation */
pthread_testcancel();
/* We should have self->p_signal != 0 and equal to the signal received */
*sig = self->p_signal;
*sig = THREAD_GETMEM(self, p_signal);
return 0;
}