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Add RW-lock

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This commit is contained in:
Bruce Hill 2025-03-30 21:08:11 -04:00
parent f3f57abbcf
commit 982d67437f
1 changed files with 23 additions and 12 deletions
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35
examples/pthreads/pthreads.tm
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@ -1,9 +1,6 @@
# A Posix Threads (pthreads) wrapper # A Posix Threads (pthreads) wrapper
use <pthread.h> use <pthread.h>
extern pthread_mutex_lock:func(mutex:&pthread_mutex_t -> Int32)
extern pthread_mutex_unlock:func(mutex:&pthread_mutex_t -> Int32)
struct pthread_mutex_t(; extern, opaque): struct pthread_mutex_t(; extern, opaque):
func new(->@pthread_mutex_t): func new(->@pthread_mutex_t):
return inline C : @pthread_mutex_t { return inline C : @pthread_mutex_t {
@ -14,14 +11,10 @@ struct pthread_mutex_t(; extern, opaque):
} }
func lock(m:&pthread_mutex_t): func lock(m:&pthread_mutex_t):
fail("Failed to lock mutex") unless pthread_mutex_lock(m) == 0 fail("Failed to lock mutex") unless inline C : Int32 { pthread_mutex_lock(_$m); } == 0
func unlock(m:&pthread_mutex_t): func unlock(m:&pthread_mutex_t):
fail("Failed to unlock mutex") unless pthread_mutex_unlock(m) == 0 fail("Failed to unlock mutex") unless inline C : Int32 { pthread_mutex_unlock(_$m); } == 0
extern pthread_cond_wait:func(cond:&pthread_cond_t, mutex:&pthread_mutex_t -> Int32)
extern pthread_cond_signal:func(cond:&pthread_cond_t -> Int32)
extern pthread_cond_broadcast:func(cond:&pthread_cond_t -> Int32)
struct pthread_cond_t(; extern, opaque): struct pthread_cond_t(; extern, opaque):
func new(->@pthread_cond_t): func new(->@pthread_cond_t):
@ -33,13 +26,31 @@ struct pthread_cond_t(; extern, opaque):
} }
func wait(cond:&pthread_cond_t, mutex:&pthread_mutex_t): func wait(cond:&pthread_cond_t, mutex:&pthread_mutex_t):
fail("Failed to wait on condition") unless pthread_cond_wait(cond, mutex) == 0 fail("Failed to wait on condition") unless inline C : Int32 { pthread_cond_wait(_$cond, _$mutex); } == 0
func signal(cond:&pthread_cond_t): func signal(cond:&pthread_cond_t):
fail("Failed to signal pthread_cond_t") unless pthread_cond_signal(cond) == 0 fail("Failed to signal pthread_cond_t") unless inline C : Int32 { pthread_cond_signal(_$cond); } == 0
func broadcast(cond:&pthread_cond_t): func broadcast(cond:&pthread_cond_t):
fail("Failed to broadcast pthread_cond_t") unless pthread_cond_broadcast(cond) == 0 fail("Failed to broadcast pthread_cond_t") unless inline C : Int32 { pthread_cond_broadcast(_$cond); } == 0
struct pthread_rwlock_t(; extern, opaque):
func new(->@pthread_rwlock_t):
return inline C : @pthread_rwlock_t {
pthread_rwlock_t *lock = GC_MALLOC(sizeof(pthread_rwlock_t));
pthread_rwlock_init(lock, NULL);
GC_register_finalizer(lock, (void*)pthread_rwlock_destroy, NULL, NULL, NULL);
lock
}
func read_lock(lock:&pthread_rwlock_t):
inline C { pthread_rwlock_rdlock(_$lock); }
func write_lock(lock:&pthread_rwlock_t):
inline C { pthread_rwlock_wrlock(_$lock); }
func unlock(lock:&pthread_rwlock_t):
inline C { pthread_rwlock_unlock(_$lock); }
struct pthread_t(; extern, opaque): struct pthread_t(; extern, opaque):
func new(fn:func() -> @pthread_t): func new(fn:func() -> @pthread_t):