diff options
Diffstat (limited to 'libc/sysdeps/linux/i386/bits/libc-lock.h')
| -rw-r--r-- | libc/sysdeps/linux/i386/bits/libc-lock.h | 147 |
1 files changed, 125 insertions, 22 deletions
diff --git a/libc/sysdeps/linux/i386/bits/libc-lock.h b/libc/sysdeps/linux/i386/bits/libc-lock.h index a14cea1aa..dbd9cc14f 100644 --- a/libc/sysdeps/linux/i386/bits/libc-lock.h +++ b/libc/sysdeps/linux/i386/bits/libc-lock.h @@ -1,5 +1,5 @@ /* libc-internal interface for mutex locks. LinuxThreads version. - Copyright (C) 1996, 1997, 1998, 1999 Free Software Foundation, Inc. + Copyright (C) 1996,1997,1998,1999,2000,2001 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 @@ -25,8 +25,10 @@ /* Mutex type. */ #ifdef _LIBC typedef pthread_mutex_t __libc_lock_t; +typedef pthread_rwlock_t __libc_rwlock_t; #else typedef struct __libc_lock_opaque__ __libc_lock_t; +typedef struct __libc_rwlock_opaque__ __libc_rwlock_t; #endif /* Type for key to thread-specific data. */ @@ -41,15 +43,28 @@ typedef pthread_key_t __libc_key_t; of libc. */ #define __libc_lock_define(CLASS,NAME) \ CLASS __libc_lock_t NAME; +#define __libc_rwlock_define(CLASS,NAME) \ + CLASS __libc_rwlock_t NAME; /* Define an initialized lock variable NAME with storage class CLASS. - For the C library we take a deeper look at the initializer. For this - implementation all fields are initialized to zero. Therefore we - don't initialize the variable which allows putting it into the BSS - section. */ -#define __libc_lock_define_initialized(CLASS,NAME) \ + For the C library we take a deeper look at the initializer. For + this implementation all fields are initialized to zero. Therefore + we don't initialize the variable which allows putting it into the + BSS section. (Except on PA-RISC and other odd architectures, where + initialized locks must be set to one due to the lack of normal + atomic operations.) */ + +#if __LT_SPINLOCK_INIT == 0 +# define __libc_lock_define_initialized(CLASS,NAME) \ CLASS __libc_lock_t NAME; +#else +# define __libc_lock_define_initialized(CLASS,NAME) \ + CLASS __libc_lock_t NAME = PTHREAD_MUTEX_INITIALIZER; +#endif + +#define __libc_rwlock_define_initialized(CLASS,NAME) \ + CLASS __libc_rwlock_t NAME = PTHREAD_RWLOCK_INITIALIZER; /* Define an initialized recursive lock variable NAME with storage class CLASS. */ @@ -60,6 +75,8 @@ typedef pthread_key_t __libc_key_t; state. */ #define __libc_lock_init(NAME) \ (__pthread_mutex_init != NULL ? __pthread_mutex_init (&(NAME), NULL) : 0); +#define __libc_rwlock_init(NAME) \ + (__pthread_rwlock_init != NULL ? __pthread_rwlock_init (&(NAME), NULL) : 0); /* Same as last but this time we initialize a recursive mutex. */ #define __libc_lock_init_recursive(NAME) \ @@ -79,6 +96,8 @@ typedef pthread_key_t __libc_key_t; called on a lock variable before the containing storage is reused. */ #define __libc_lock_fini(NAME) \ (__pthread_mutex_destroy != NULL ? __pthread_mutex_destroy (&(NAME)) : 0); +#define __libc_rwlock_fini(NAME) \ + (__pthread_rwlock_destroy != NULL ? __pthread_rwlock_destroy (&(NAME)) : 0); /* Finalize recursive named lock. */ #define __libc_lock_fini_recursive(NAME) __libc_lock_fini (NAME) @@ -86,6 +105,10 @@ typedef pthread_key_t __libc_key_t; /* Lock the named lock variable. */ #define __libc_lock_lock(NAME) \ (__pthread_mutex_lock != NULL ? __pthread_mutex_lock (&(NAME)) : 0); +#define __libc_rwlock_rdlock(NAME) \ + (__pthread_rwlock_rdlock != NULL ? __pthread_rwlock_rdlock (&(NAME)) : 0); +#define __libc_rwlock_wrlock(NAME) \ + (__pthread_rwlock_wrlock != NULL ? __pthread_rwlock_wrlock (&(NAME)) : 0); /* Lock the recursive named lock variable. */ #define __libc_lock_lock_recursive(NAME) __libc_lock_lock (NAME) @@ -93,6 +116,12 @@ typedef pthread_key_t __libc_key_t; /* Try to lock the named lock variable. */ #define __libc_lock_trylock(NAME) \ (__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (&(NAME)) : 0) +#define __libc_rwlock_tryrdlock(NAME) \ + (__pthread_rwlock_tryrdlock != NULL \ + ? __pthread_rwlock_tryrdlock (&(NAME)) : 0) +#define __libc_rwlock_trywrlock(NAME) \ + (__pthread_rwlock_trywrlock != NULL \ + ? __pthread_rwlock_trywrlock (&(NAME)) : 0) /* Try to lock the recursive named lock variable. */ #define __libc_lock_trylock_recursive(NAME) __libc_lock_trylock (NAME) @@ -100,6 +129,8 @@ typedef pthread_key_t __libc_key_t; /* Unlock the named lock variable. */ #define __libc_lock_unlock(NAME) \ (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (&(NAME)) : 0); +#define __libc_rwlock_unlock(NAME) \ + (__pthread_rwlock_unlock != NULL ? __pthread_rwlock_unlock (&(NAME)) : 0); /* Unlock the recursive named lock variable. */ #define __libc_lock_unlock_recursive(NAME) __libc_lock_unlock (NAME) @@ -121,9 +152,9 @@ typedef pthread_key_t __libc_key_t; do { \ if (__pthread_once != NULL) \ __pthread_once (&(ONCE_CONTROL), (INIT_FUNCTION)); \ - else if ((ONCE_CONTROL) == 0) { \ + else if ((ONCE_CONTROL) == PTHREAD_ONCE_INIT) { \ INIT_FUNCTION (); \ - (ONCE_CONTROL) = 1; \ + (ONCE_CONTROL) = !PTHREAD_ONCE_INIT; \ } \ } while (0) @@ -166,27 +197,93 @@ typedef pthread_key_t __libc_key_t; #define __libc_atfork(PREPARE, PARENT, CHILD) \ (__pthread_atfork != NULL ? __pthread_atfork (PREPARE, PARENT, CHILD) : 0) +/* Functions that are used by this file and are internal to the GNU C + library. */ + +extern int __pthread_mutex_init (pthread_mutex_t *__mutex, + __const pthread_mutexattr_t *__mutex_attr); + +extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex); + +extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex); + +extern int __pthread_mutex_lock (pthread_mutex_t *__mutex); + +extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex); + +extern int __pthread_mutexattr_init (pthread_mutexattr_t *__attr); + +extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *__attr); + +extern int __pthread_mutexattr_settype (pthread_mutexattr_t *__attr, + int __kind); + +#ifdef __USE_UNIX98 +extern int __pthread_rwlock_init (pthread_rwlock_t *__rwlock, + __const pthread_rwlockattr_t *__attr); + +extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock); + +extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock); + +extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock); + +extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock); + +extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock); + +extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock); +#endif + +extern int __pthread_key_create (pthread_key_t *__key, + void (*__destr_function) (void *)); + +extern int __pthread_setspecific (pthread_key_t __key, + __const void *__pointer); + +extern void *__pthread_getspecific (pthread_key_t __key); + +extern int __pthread_once (pthread_once_t *__once_control, + void (*__init_routine) (void)); + +extern int __pthread_atfork (void (*__prepare) (void), + void (*__parent) (void), + void (*__child) (void)); + + /* Make the pthread functions weak so that we can elide them from single-threaded processes. */ #ifndef __NO_WEAK_PTHREAD_ALIASES # ifdef weak_extern -weak_extern (__pthread_mutex_init) -weak_extern (__pthread_mutex_destroy) -weak_extern (__pthread_mutex_lock) -weak_extern (__pthread_mutex_trylock) -weak_extern (__pthread_mutex_unlock) -weak_extern (__pthread_mutexattr_init) -weak_extern (__pthread_mutexattr_destroy) -weak_extern (__pthread_mutexattr_settype) -weak_extern (__pthread_key_create) -weak_extern (__pthread_setspecific) -weak_extern (__pthread_getspecific) -weak_extern (__pthread_once) +# if _LIBC +# include <bp-sym.h> +# else +# define BP_SYM (sym) sym +# endif +weak_extern (BP_SYM (__pthread_mutex_init)) +weak_extern (BP_SYM (__pthread_mutex_destroy)) +weak_extern (BP_SYM (__pthread_mutex_lock)) +weak_extern (BP_SYM (__pthread_mutex_trylock)) +weak_extern (BP_SYM (__pthread_mutex_unlock)) +weak_extern (BP_SYM (__pthread_mutexattr_init)) +weak_extern (BP_SYM (__pthread_mutexattr_destroy)) +weak_extern (BP_SYM (__pthread_mutexattr_settype)) +weak_extern (BP_SYM (__pthread_rwlock_init)) +weak_extern (BP_SYM (__pthread_rwlock_destroy)) +weak_extern (BP_SYM (__pthread_rwlock_rdlock)) +weak_extern (BP_SYM (__pthread_rwlock_tryrdlock)) +weak_extern (BP_SYM (__pthread_rwlock_wrlock)) +weak_extern (BP_SYM (__pthread_rwlock_trywrlock)) +weak_extern (BP_SYM (__pthread_rwlock_unlock)) +weak_extern (BP_SYM (__pthread_key_create)) +weak_extern (BP_SYM (__pthread_setspecific)) +weak_extern (BP_SYM (__pthread_getspecific)) +weak_extern (BP_SYM (__pthread_once)) weak_extern (__pthread_initialize) weak_extern (__pthread_atfork) -weak_extern (_pthread_cleanup_push_defer) -weak_extern (_pthread_cleanup_pop_restore) +weak_extern (BP_SYM (_pthread_cleanup_push_defer)) +weak_extern (BP_SYM (_pthread_cleanup_pop_restore)) # else # pragma weak __pthread_mutex_init # pragma weak __pthread_mutex_destroy @@ -196,6 +293,12 @@ weak_extern (_pthread_cleanup_pop_restore) # pragma weak __pthread_mutexattr_init # pragma weak __pthread_mutexattr_destroy # pragma weak __pthread_mutexattr_settype +# pragma weak __pthread_rwlock_destroy +# pragma weak __pthread_rwlock_rdlock +# pragma weak __pthread_rwlock_tryrdlock +# pragma weak __pthread_rwlock_wrlock +# pragma weak __pthread_rwlock_trywrlock +# pragma weak __pthread_rwlock_unlock # pragma weak __pthread_key_create # pragma weak __pthread_setspecific # pragma weak __pthread_getspecific |