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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.
56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/* Linuxthreads - a simple clone()-based implementation of Posix */
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/* threads for Linux. */
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/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */
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/* */
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/* This program is free software; you can redistribute it and/or */
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/* modify it under the terms of the GNU Library General Public License */
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/* as published by the Free Software Foundation; either version 2 */
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/* of the License, or (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU Library General Public License for more details. */
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/* Redefine siglongjmp and longjmp so that they interact correctly
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with cleanup handlers */
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#include <setjmp.h>
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#include "pthread.h"
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#include "internals.h"
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/* These functions are not declared anywhere since they shouldn't be
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used at another place but here. */
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extern void __libc_siglongjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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extern void __libc_longjmp (sigjmp_buf env, int val)
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__attribute__ ((noreturn));
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static void pthread_cleanup_upto(__jmp_buf target)
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{
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pthread_descr self = thread_self();
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struct _pthread_cleanup_buffer * c;
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for (c = THREAD_GETMEM(self, p_cleanup);
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c != NULL && _JMPBUF_UNWINDS(target, c);
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c = c->prev)
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c->routine(c->arg);
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THREAD_SETMEM(self, p_cleanup, c);
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if (THREAD_GETMEM(self, p_in_sighandler)
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&& _JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler)))
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THREAD_SETMEM(self, p_in_sighandler, NULL);
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}
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void siglongjmp(sigjmp_buf env, int val)
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{
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pthread_cleanup_upto(env->__jmpbuf);
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__libc_siglongjmp(env, val);
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}
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void longjmp(jmp_buf env, int val)
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{
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pthread_cleanup_upto(env->__jmpbuf);
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__libc_longjmp(env, val);
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}
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