1 /* Copyright (C) 2003, 2007 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 2.1 of the 8 License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; see the file COPYING.LIB. If 17 not, see <http://www.gnu.org/licenses/>. */ 18 19 #include <errno.h> 20 #include <stdlib.h> 21 #include <time.h> 22 #include <sysdep.h> 23 #include <bits/kernel-features.h> 24 #include "kernel-posix-timers.h" 25 26 27 #ifdef __NR_timer_delete 28 # ifndef __ASSUME_POSIX_TIMERS 29 static int compat_timer_delete (timer_t timerid); 30 # define timer_delete static compat_timer_delete 31 # include <nptl/sysdeps/pthread/timer_delete.c> 32 # undef timer_delete 33 # endif 34 35 # ifdef timer_delete_alias 36 # define timer_delete timer_delete_alias 37 # endif 38 39 40 int timer_delete(timer_t timerid)41timer_delete ( 42 timer_t timerid) 43 { 44 # undef timer_delete 45 # ifndef __ASSUME_POSIX_TIMERS 46 if (__no_posix_timers >= 0) 47 # endif 48 { 49 struct timer *kt = (struct timer *) timerid; 50 51 /* Delete the kernel timer object. */ 52 int res = INLINE_SYSCALL (timer_delete, 1, kt->ktimerid); 53 54 if (res == 0) 55 { 56 if (kt->sigev_notify == SIGEV_THREAD) 57 { 58 /* Remove the timer from the list. */ 59 pthread_mutex_lock (&__active_timer_sigev_thread_lock); 60 if (__active_timer_sigev_thread == kt) 61 __active_timer_sigev_thread = kt->next; 62 else 63 { 64 struct timer *prevp = __active_timer_sigev_thread; 65 while (prevp->next != NULL) 66 if (prevp->next == kt) 67 { 68 prevp->next = kt->next; 69 break; 70 } 71 else 72 prevp = prevp->next; 73 } 74 pthread_mutex_unlock (&__active_timer_sigev_thread_lock); 75 } 76 77 # ifndef __ASSUME_POSIX_TIMERS 78 /* We know the syscall support is available. */ 79 __no_posix_timers = 1; 80 # endif 81 82 /* Free the memory. */ 83 (void) free (kt); 84 85 return 0; 86 } 87 88 /* The kernel timer is not known or something else bad happened. 89 Return the error. */ 90 # ifndef __ASSUME_POSIX_TIMERS 91 if (errno != ENOSYS) 92 { 93 __no_posix_timers = 1; 94 # endif 95 return -1; 96 # ifndef __ASSUME_POSIX_TIMERS 97 } 98 99 __no_posix_timers = -1; 100 # endif 101 } 102 103 # ifndef __ASSUME_POSIX_TIMERS 104 return compat_timer_delete (timerid); 105 # endif 106 } 107 #else 108 # ifdef timer_delete_alias 109 # define timer_delete timer_delete_alias 110 # endif 111 /* The new system calls are not available. Use the userlevel 112 implementation. */ 113 # include <nptl/sysdeps/pthread/timer_delete.c> 114 #endif 115