diff options
Diffstat (limited to 'linuxthreads/sysdeps/pthread')
| -rw-r--r-- | linuxthreads/sysdeps/pthread/bits/pthreadtypes.h | 10 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/pthread/pthread.h | 21 |
2 files changed, 26 insertions, 5 deletions
diff --git a/linuxthreads/sysdeps/pthread/bits/pthreadtypes.h b/linuxthreads/sysdeps/pthread/bits/pthreadtypes.h index db4c3790ce..a4878310ac 100644 --- a/linuxthreads/sysdeps/pthread/bits/pthreadtypes.h +++ b/linuxthreads/sysdeps/pthread/bits/pthreadtypes.h @@ -23,11 +23,11 @@ #include <bits/sched.h> /* Fast locks (not abstract because mutexes and conditions aren't abstract). */ -struct _pthread_fastlock +typedef struct { long int __status; /* "Free" or "taken" or head of waiting list */ int __spinlock; /* For compare-and-swap emulation */ -}; +} pthread_spinlock_t; #ifndef _PTHREAD_DESCR_DEFINED /* Thread descriptors */ @@ -54,7 +54,7 @@ typedef struct /* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */ typedef struct { - struct _pthread_fastlock __c_lock; /* Protect against concurrent access */ + pthread_spinlock_t __c_lock; /* Protect against concurrent access */ _pthread_descr __c_waiting; /* Threads waiting on this condition */ } pthread_cond_t; @@ -78,7 +78,7 @@ typedef struct int __m_count; /* Depth of recursive locking */ _pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */ int __m_kind; /* Mutex kind: fast, recursive or errcheck */ - struct _pthread_fastlock __m_lock; /* Underlying fast lock */ + pthread_spinlock_t __m_lock; /* Underlying fast lock */ } pthread_mutex_t; @@ -97,7 +97,7 @@ typedef int pthread_once_t; /* Read-write locks. */ typedef struct _pthread_rwlock_t { - struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */ + pthread_spinlock_t __rw_lock; /* Lock to guarantee mutual exclusion */ int __rw_readers; /* Number of readers */ _pthread_descr __rw_writer; /* Identity of writer, or NULL if none */ _pthread_descr __rw_read_waiting; /* Threads waiting for reading */ diff --git a/linuxthreads/sysdeps/pthread/pthread.h b/linuxthreads/sysdeps/pthread/pthread.h index 1ff7cba7a6..4cc1aaae06 100644 --- a/linuxthreads/sysdeps/pthread/pthread.h +++ b/linuxthreads/sysdeps/pthread/pthread.h @@ -405,6 +405,27 @@ extern int pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *__attr, int __pref) __THROW; #endif +#ifdef __USE_XOPEN2K +/* The IEEE Std. 10003.1j-2000 introduces functions to implement + spinlocks. */ + +/* Initialize the spinlock LOCK. If PSHARED is nonzero the spinlock can + be shared between different processes. */ +extern int pthread_spin_init (pthread_spinlock_t *__lock, int __pshared); + +/* Destroy the spinlock LOCK. */ +extern int pthread_spin_destroy (pthread_spinlock_t *__lock); + +/* Wait until spinlock LOCK is retrieved. */ +extern int pthread_spin_lock (pthread_spinlock_t *__lock); + +/* Try to lock spinlock LOCK. */ +extern int pthread_spin_trylock (pthread_spinlock_t *__lock); + +/* Release spinlock LOCK. */ +extern int pthread_spin_unlock (pthread_spinlock_t *__lock); +#endif + /* Functions for handling thread-specific data. */ |