diff options
Diffstat (limited to 'nptl/sysdeps/pthread/bits/libc-lock.h')
| -rw-r--r-- | nptl/sysdeps/pthread/bits/libc-lock.h | 137 |
1 files changed, 114 insertions, 23 deletions
diff --git a/nptl/sysdeps/pthread/bits/libc-lock.h b/nptl/sysdeps/pthread/bits/libc-lock.h index 9536d0c909..30e3410cbc 100644 --- a/nptl/sysdeps/pthread/bits/libc-lock.h +++ b/nptl/sysdeps/pthread/bits/libc-lock.h @@ -33,16 +33,19 @@ ld.so might be used on old kernels with a different libc.so. */ #ifdef _LIBC # include <lowlevellock.h> +# include <tls.h> #endif /* Mutex type. */ #if defined _LIBC || defined _IO_MTSAFE_IO -# if defined NOT_IN_libc || !defined _LIBC +# if (defined NOT_IN_libc && !defined IS_IN_libpthread) || !defined _LIBC typedef pthread_mutex_t __libc_lock_t; +typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t; # else typedef int __libc_lock_t; +typedef struct { int lock; int cnt; void *owner; } __libc_lock_recursive_t; # endif -typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t; +typedef struct { pthread_mutex_t mutex; } __rtld_lock_recursive_t; # ifdef __USE_UNIX98 typedef pthread_rwlock_t __libc_rwlock_t; # else @@ -70,6 +73,8 @@ typedef pthread_key_t __libc_key_t; CLASS __libc_rwlock_t NAME; #define __libc_lock_define_recursive(CLASS,NAME) \ CLASS __libc_lock_recursive_t NAME; +#define __rtld_lock_define_recursive(CLASS,NAME) \ + CLASS __rtld_lock_recursive_t NAME; /* Define an initialized lock variable NAME with storage class CLASS. @@ -80,7 +85,7 @@ typedef pthread_key_t __libc_key_t; initialized locks must be set to one due to the lack of normal atomic operations.) */ -#if defined _LIBC && !defined NOT_IN_libc +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) # if LLL_LOCK_INITIALIZER == 0 # define __libc_lock_define_initialized(CLASS,NAME) \ CLASS __libc_lock_t NAME; @@ -103,11 +108,27 @@ typedef pthread_key_t __libc_key_t; /* Define an initialized recursive lock variable NAME with storage class CLASS. */ -#define __libc_lock_define_initialized_recursive(CLASS,NAME) \ +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# if LLL_LOCK_INITIALIZER == 0 +# define __libc_lock_define_initialized_recursive(CLASS,NAME) \ + CLASS __libc_lock_recursive_t NAME; +# else +# define __libc_lock_define_initialized_recursive(CLASS,NAME) \ + CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER; +# endif +# define _LIBC_LOCK_RECURSIVE_INITIALIZER \ + { LLL_LOCK_INITIALIZER, 0, NULL } +#else +# define __libc_lock_define_initialized_recursive(CLASS,NAME) \ CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER; -#define _LIBC_LOCK_RECURSIVE_INITIALIZER \ +# define _LIBC_LOCK_RECURSIVE_INITIALIZER \ {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP} +#endif +#define __rtld_lock_define_initialized_recursive(CLASS,NAME) \ + CLASS __rtld_lock_recursive_t NAME = _RTLD_LOCK_RECURSIVE_INITIALIZER; +#define _RTLD_LOCK_RECURSIVE_INITIALIZER \ + {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP} /* If we check for a weakly referenced symbol and then perform a normal jump to it te code generated for some platforms in case of @@ -126,7 +147,7 @@ typedef pthread_key_t __libc_key_t; /* Initialize the named lock variable, leaving it in a consistent, unlocked state. */ -#if defined _LIBC && !defined NOT_IN_libc +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) # define __libc_lock_init(NAME) (NAME) = LLL_LOCK_INITIALIZER; #else # define __libc_lock_init(NAME) \ @@ -136,23 +157,40 @@ typedef pthread_key_t __libc_key_t; __libc_maybe_call (__pthread_rwlock_init, (&(NAME), NULL), 0) /* Same as last but this time we initialize a recursive mutex. */ -#define __libc_lock_init_recursive(NAME) \ +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# define __libc_lock_init_recursive(NAME) \ + (NAME) = (__libc_lock_recursive_t) _LIBC_LOCK_RECURSIVE_INITIALIZER +#else +# define __libc_lock_init_recursive(NAME) \ + do { \ + if (__pthread_mutex_init != NULL) \ + { \ + pthread_mutexattr_t __attr; \ + __pthread_mutexattr_init (&__attr); \ + __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \ + __pthread_mutex_init (&(NAME).mutex, &__attr); \ + __pthread_mutexattr_destroy (&__attr); \ + } \ + } while (0) +#endif + +#define __rtld_lock_init_recursive(NAME) \ do { \ if (__pthread_mutex_init != NULL) \ { \ pthread_mutexattr_t __attr; \ __pthread_mutexattr_init (&__attr); \ - __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \ + __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \ __pthread_mutex_init (&(NAME).mutex, &__attr); \ __pthread_mutexattr_destroy (&__attr); \ } \ - } while (0); + } while (0) /* Finalize the named lock variable, which must be locked. It cannot be used again until __libc_lock_init is called again on it. This must be called on a lock variable before the containing storage is reused. */ -#if defined _LIBC && !defined NOT_IN_libc -# define __libc_lock_fini(NAME) (0) +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# define __libc_lock_fini(NAME) ((void) 0) #else # define __libc_lock_fini(NAME) \ __libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0) @@ -161,11 +199,15 @@ typedef pthread_key_t __libc_key_t; __libc_maybe_call (__pthread_rwlock_destroy, (&(NAME)), 0) /* Finalize recursive named lock. */ -#define __libc_lock_fini_recursive(NAME) \ +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# define __libc_lock_fini_recursive(NAME) ((void) 0) +#else +# define __libc_lock_fini_recursive(NAME) \ __libc_maybe_call (__pthread_mutex_destroy, (&(NAME)), 0) +#endif /* Lock the named lock variable. */ -#if defined _LIBC && !defined NOT_IN_libc +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) # define __libc_lock_lock(NAME) \ lll_lock (NAME); #else @@ -178,11 +220,27 @@ typedef pthread_key_t __libc_key_t; __libc_maybe_call (__pthread_rwlock_wrlock, (&(NAME)), 0) /* Lock the recursive named lock variable. */ -#define __libc_lock_lock_recursive(NAME) \ - __libc_maybe_call (__pthread_mutex_lock, (&(NAME)), 0) +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# define __libc_lock_lock_recursive(NAME) \ + do { \ + void *self = THREAD_SELF; \ + if ((NAME).owner != self) \ + { \ + lll_lock ((NAME).lock); \ + (NAME).owner = self; \ + } \ + ++(NAME).cnt; \ + } while (0) +#else +# define __libc_lock_lock_recursive(NAME) \ + __libc_maybe_call (__pthread_mutex_lock, (&(NAME).mutex), 0) +#endif + +#define __rtld_lock_lock_recursive(NAME) \ + __libc_maybe_call (__pthread_mutex_lock, (&(NAME).mutex), 0) /* Try to lock the named lock variable. */ -#if defined _LIBC && !defined NOT_IN_libc +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) # define __libc_lock_trylock(NAME) \ lll_trylock (NAME) #else @@ -195,11 +253,34 @@ typedef pthread_key_t __libc_key_t; __libc_maybe_call (__pthread_rwlock_trywrlock, (&(NAME)), 0) /* Try to lock the recursive named lock variable. */ -#define __libc_lock_trylock_recursive(NAME) \ +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +# define __libc_lock_trylock_recursive(NAME) \ + do { \ + int result = 0; \ + void *self = THREAD_SELF; \ + if ((NAME).owner != self) \ + { \ + if (lll_trylock ((NAME).lock) == 0) \ + { \ + (NAME).owner = self; \ + (NAME).cnt = 1; \ + } \ + else \ + result = EBUSY; \ + } \ + else \ + ++(NAME).cnt; \ + } while (0) +#else +# define __libc_lock_trylock_recursive(NAME) \ __libc_maybe_call (__pthread_mutex_trylock, (&(NAME)), 0) +#endif + +#define __rtld_lock_trylock_recursive(NAME) \ + __libc_maybe_call (__pthread_mutex_trylock, (&(NAME).mutex), 0) /* Unlock the named lock variable. */ -#if defined _LIBC && !defined NOT_IN_libc +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) # define __libc_lock_unlock(NAME) \ lll_unlock (NAME); #else @@ -210,9 +291,23 @@ typedef pthread_key_t __libc_key_t; __libc_maybe_call (__pthread_rwlock_unlock, (&(NAME)), 0) /* Unlock the recursive named lock variable. */ -#define __libc_lock_unlock_recursive(NAME) \ +#if defined _LIBC && (!defined NOT_IN_libc || defined IS_IN_libpthread) +/* We do no error checking here. */ +# define __libc_lock_unlock_recursive(NAME) \ + do { \ + if (--(NAME).cnt == 0) \ + { \ + (NAME).owner = NULL; \ + lll_unlock ((NAME).lock); \ + } \ + } while (0) +#else +# define __libc_lock_unlock_recursive(NAME) \ __libc_maybe_call (__pthread_mutex_unlock, (&(NAME)), 0) +#endif +#define __rtld_lock_unlock_recursive(NAME) \ + __libc_maybe_call (__pthread_mutex_unlock, (&(NAME).mutex), 0) /* Define once control variable. */ #if PTHREAD_ONCE_INIT == 0 @@ -394,8 +489,4 @@ weak_extern (BP_SYM (_pthread_cleanup_pop_restore)) # endif #endif -/* We need portable names for some functions. E.g., when they are - used as argument to __libc_cleanup_region_start. */ -#define __libc_mutex_unlock __pthread_mutex_unlock - #endif /* bits/libc-lock.h */ |