diff options
Diffstat (limited to 'sysdeps/nptl/gai_misc.h')
| -rw-r--r-- | sysdeps/nptl/gai_misc.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/sysdeps/nptl/gai_misc.h b/sysdeps/nptl/gai_misc.h deleted file mode 100644 index 8b2a2c1d78..0000000000 --- a/sysdeps/nptl/gai_misc.h +++ /dev/null @@ -1,123 +0,0 @@ -/* Copyright (C) 2006-2017 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -/* We define a special synchronization primitive for AIO. POSIX - conditional variables would be ideal but the pthread_cond_*wait - operations do not return on EINTR. This is a requirement for - correct aio_suspend and lio_listio implementations. */ - -#include <assert.h> -#include <signal.h> -#include <nptl/pthreadP.h> -#include <futex-internal.h> - -#define DONT_NEED_GAI_MISC_COND 1 - -#define GAI_MISC_NOTIFY(waitlist) \ - do { \ - if (*waitlist->counterp > 0 && --*waitlist->counterp == 0) \ - futex_wake ((unsigned int *) waitlist->counterp, 1, FUTEX_PRIVATE); \ - } while (0) - -#define GAI_MISC_WAIT(result, futex, timeout, cancel) \ - do { \ - volatile unsigned int *futexaddr = &futex; \ - unsigned int oldval = futex; \ - \ - if (oldval != 0) \ - { \ - pthread_mutex_unlock (&__gai_requests_mutex); \ - \ - int oldtype; \ - if (cancel) \ - oldtype = LIBC_CANCEL_ASYNC (); \ - \ - int status; \ - do \ - { \ - status = futex_reltimed_wait ((unsigned int *) futexaddr, oldval, \ - timeout, FUTEX_PRIVATE); \ - if (status != EAGAIN) \ - break; \ - \ - oldval = *futexaddr; \ - } \ - while (oldval != 0); \ - \ - if (cancel) \ - LIBC_CANCEL_RESET (oldtype); \ - \ - if (status == EINTR) \ - result = EINTR; \ - else if (status == ETIMEDOUT) \ - result = EAGAIN; \ - else \ - assert (status == 0 || status == EAGAIN); \ - \ - pthread_mutex_lock (&__gai_requests_mutex); \ - } \ - } while (0) - - -#define gai_start_notify_thread __gai_start_notify_thread -#define gai_create_helper_thread __gai_create_helper_thread - -extern inline void -__gai_start_notify_thread (void) -{ - sigset_t ss; - sigemptyset (&ss); - int sigerr __attribute__ ((unused)); - sigerr = pthread_sigmask (SIG_SETMASK, &ss, NULL); - assert_perror (sigerr); -} - -extern inline int -__gai_create_helper_thread (pthread_t *threadp, void *(*tf) (void *), - void *arg) -{ - pthread_attr_t attr; - - /* Make sure the thread is created detached. */ - pthread_attr_init (&attr); - pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); - - /* The helper thread needs only very little resources. */ - (void) pthread_attr_setstacksize (&attr, - __pthread_get_minstack (&attr) - + 4 * PTHREAD_STACK_MIN); - - /* Block all signals in the helper thread. To do this thoroughly we - temporarily have to block all signals here. */ - sigset_t ss; - sigset_t oss; - sigfillset (&ss); - int sigerr __attribute__ ((unused)); - sigerr = pthread_sigmask (SIG_SETMASK, &ss, &oss); - assert_perror (sigerr); - - int ret = pthread_create (threadp, &attr, tf, arg); - - /* Restore the signal mask. */ - sigerr = pthread_sigmask (SIG_SETMASK, &oss, NULL); - assert_perror (sigerr); - - (void) pthread_attr_destroy (&attr); - return ret; -} - -#include_next <gai_misc.h> |