| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | /* Basic platform-independent macro definitions for mutexes, |
| 2 | thread-specific data and parameters for malloc. |
| 3 | Copyright (C) 2003 Free Software Foundation, Inc. |
| 4 | This file is part of the GNU C Library. |
| 5 | |
| 6 | The GNU C Library is free software; you can redistribute it and/or |
| 7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either |
| 9 | version 2.1 of the License, or (at your option) any later version. |
| 10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | Lesser General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 19 | 02111-1307 USA. */ |
| 20 | |
| 21 | #ifndef _MALLOC_MACHINE_H |
| 22 | #define _MALLOC_MACHINE_H |
| 23 | |
| 24 | #undef thread_atfork_static |
| 25 | |
| 26 | #include <atomic.h> |
| 27 | #include <bits/libc-lock.h> |
| 28 | |
| 29 | __libc_lock_define (typedef, mutex_t) |
| 30 | |
| 31 | #define mutex_init(m) \ |
| 32 | __libc_maybe_call2 (pthread_mutex_init, (m, NULL), (*(int *)(m) = 0)) |
| 33 | #define mutex_lock(m) \ |
| 34 | __libc_maybe_call2 (pthread_mutex_lock, (m), ((*(int *)(m) = 1), 0)) |
| 35 | #define mutex_trylock(m) \ |
| 36 | __libc_maybe_call2 (pthread_mutex_trylock, (m), \ |
| 37 | (*(int *)(m) ? 1 : ((*(int *)(m) = 1), 0))) |
| 38 | #define mutex_unlock(m) \ |
| 39 | __libc_maybe_call2 (pthread_mutex_unlock, (m), (*(int *)(m) = 0)) |
| 40 | |
| 41 | /* This is defined by newer gcc version unique for each module. */ |
| 42 | extern void *__dso_handle __attribute__ ((__weak__)); |
| 43 | |
| 44 | #include <fork.h> |
| 45 | |
| 46 | #ifdef SHARED |
| 47 | # define thread_atfork(prepare, parent, child) \ |
| 48 | __register_atfork (prepare, parent, child, __dso_handle) |
| 49 | #else |
| 50 | # define thread_atfork(prepare, parent, child) \ |
| 51 | __register_atfork (prepare, parent, child, \ |
| 52 | &__dso_handle == NULL ? NULL : __dso_handle) |
| 53 | #endif |
| 54 | |
| 55 | /* thread specific data for glibc */ |
| 56 | |
| 57 | #include <bits/libc-tsd.h> |
| 58 | |
| 59 | typedef int tsd_key_t[1]; /* no key data structure, libc magic does it */ |
| 60 | __libc_tsd_define (static, MALLOC) /* declaration/common definition */ |
| 61 | #define tsd_key_create(key, destr) ((void) (key)) |
| 62 | #define tsd_setspecific(key, data) __libc_tsd_set (MALLOC, (data)) |
| 63 | #define tsd_getspecific(key, vptr) ((vptr) = __libc_tsd_get (MALLOC)) |
| 64 | |
| 65 | #include <sysdeps/generic/malloc-machine.h> |
| 66 | |
| 67 | #endif /* !defined(_MALLOC_MACHINE_H) */ |