Ruby  3.4.0dev (2024-11-22 revision 0989400a925cd201defdca9eb28eb87200b30785)
Functions
thread_native.h File Reference

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Functions

rb_nativethread_id_t rb_nativethread_self (void)
 Queries the ID of the native thread that is calling this function. More...
 
void rb_nativethread_lock_initialize (rb_nativethread_lock_t *lock)
 Fills the passed lock with an initial value. More...
 
void rb_nativethread_lock_destroy (rb_nativethread_lock_t *lock)
 Destroys the passed mutex. More...
 
void rb_nativethread_lock_lock (rb_nativethread_lock_t *lock)
 Blocks until the current thread obtains a lock. More...
 
void rb_nativethread_lock_unlock (rb_nativethread_lock_t *lock)
 Releases a lock. More...
 
void rb_native_mutex_lock (rb_nativethread_lock_t *lock)
 Just another name of rb_nativethread_lock_lock. More...
 
int rb_native_mutex_trylock (rb_nativethread_lock_t *lock)
 Identical to rb_native_mutex_lock(), except it doesn't block in case rb_native_mutex_lock() would. More...
 
void rb_native_mutex_unlock (rb_nativethread_lock_t *lock)
 Just another name of rb_nativethread_lock_unlock. More...
 
void rb_native_mutex_initialize (rb_nativethread_lock_t *lock)
 Just another name of rb_nativethread_lock_initialize. More...
 
void rb_native_mutex_destroy (rb_nativethread_lock_t *lock)
 Just another name of rb_nativethread_lock_destroy. More...
 
void rb_native_cond_signal (rb_nativethread_cond_t *cond)
 Signals a condition variable. More...
 
void rb_native_cond_broadcast (rb_nativethread_cond_t *cond)
 Signals a condition variable. More...
 
void rb_native_cond_wait (rb_nativethread_cond_t *cond, rb_nativethread_lock_t *mutex)
 Waits for the passed condition variable to be signalled. More...
 
void rb_native_cond_timedwait (rb_nativethread_cond_t *cond, rb_nativethread_lock_t *mutex, unsigned long msec)
 Identical to rb_native_cond_wait(), except it additionally takes timeout in msec resolution. More...
 
void rb_native_cond_initialize (rb_nativethread_cond_t *cond)
 Fills the passed condition variable with an initial value. More...
 
void rb_native_cond_destroy (rb_nativethread_cond_t *cond)
 Destroys the passed condition variable. More...
 

Detailed Description

Author
Author
ko1
Date
Wed May 14 19:37:31 2014

This file contains wrapper APIs for native thread primitives which Ruby interpreter uses.

Now, we only support pthread and Windows threads.

If you want to use Ruby's Mutex and so on to synchronize Ruby Threads, please use Mutex directly.

Definition in file thread_native.h.

Function Documentation

◆ rb_native_cond_broadcast()

void rb_native_cond_broadcast ( rb_nativethread_cond_t *  cond)

Signals a condition variable.

Parameters
[out]condA condition variable to ping.
Postcondition
All threads waiting for cond gets signalled.

◆ rb_native_cond_destroy()

void rb_native_cond_destroy ( rb_nativethread_cond_t *  cond)

Destroys the passed condition variable.

Parameters
[out]condA condition variable to kill.
Postcondition
cond is no longer eligible for other functions.

◆ rb_native_cond_initialize()

void rb_native_cond_initialize ( rb_nativethread_cond_t *  cond)

Fills the passed condition variable with an initial value.

Parameters
[out]condA condition variable to initialise.
Postcondition
cond is updated to its initial state.

◆ rb_native_cond_signal()

void rb_native_cond_signal ( rb_nativethread_cond_t *  cond)

Signals a condition variable.

Parameters
[out]condA condition variable to ping.
Postcondition
More than one threads waiting for cond gets signalled.
Note
This function can spuriously wake multiple threads up. pthread_cond_signal(3posix) says it can even be "impossible to avoid the unblocking of more than one thread blocked on a condition variable". Just brace spurious wakeups.

◆ rb_native_cond_timedwait()

void rb_native_cond_timedwait ( rb_nativethread_cond_t *  cond,
rb_nativethread_lock_t *  mutex,
unsigned long  msec 
)

Identical to rb_native_cond_wait(), except it additionally takes timeout in msec resolution.

Timeouts can be detected by catching exceptions.

Parameters
[out]condA condition variable to wait.
[out]mutexA mutex.
[in]msecTimeout.
Exceptions
rb_eSystemCallErrorErrno::ETIMEDOUT for timeout.
Precondition
mutex is owned by the current thread.
Postcondition
mutex is owned by the current thread.
Note
This can wake up spuriously.

◆ rb_native_cond_wait()

void rb_native_cond_wait ( rb_nativethread_cond_t *  cond,
rb_nativethread_lock_t *  mutex 
)

Waits for the passed condition variable to be signalled.

Parameters
[out]condA condition variable to wait.
[out]mutexA mutex.
Precondition
mutex is owned by the current thread.
Postcondition
mutex is owned by the current thread.
Note
This can wake up spuriously.

◆ rb_native_mutex_destroy()

void rb_native_mutex_destroy ( rb_nativethread_lock_t *  lock)

Just another name of rb_nativethread_lock_destroy.

Referenced by rb_nativethread_lock_destroy().

◆ rb_native_mutex_initialize()

void rb_native_mutex_initialize ( rb_nativethread_lock_t *  lock)

◆ rb_native_mutex_lock()

void rb_native_mutex_lock ( rb_nativethread_lock_t *  lock)

Just another name of rb_nativethread_lock_lock.

Referenced by rb_nativethread_lock_lock().

◆ rb_native_mutex_trylock()

int rb_native_mutex_trylock ( rb_nativethread_lock_t *  lock)

Identical to rb_native_mutex_lock(), except it doesn't block in case rb_native_mutex_lock() would.

Parameters
[out]lockA mutex to lock.
Return values
0lock is successfully owned by the current thread.
EBUSYlock is owned by someone else.

◆ rb_native_mutex_unlock()

void rb_native_mutex_unlock ( rb_nativethread_lock_t *  lock)

Just another name of rb_nativethread_lock_unlock.

Referenced by rb_nativethread_lock_unlock().

◆ rb_nativethread_lock_destroy()

void rb_nativethread_lock_destroy ( rb_nativethread_lock_t *  lock)

Destroys the passed mutex.

Parameters
[out]lockA mutex to kill.
Postcondition
lock is no longer eligible for other functions.

Definition at line 292 of file thread.c.

◆ rb_nativethread_lock_initialize()

void rb_nativethread_lock_initialize ( rb_nativethread_lock_t *  lock)

Fills the passed lock with an initial value.

Parameters
[out]lockA mutex to initialise.
Postcondition
lock is updated to its initial state.

Definition at line 286 of file thread.c.

◆ rb_nativethread_lock_lock()

void rb_nativethread_lock_lock ( rb_nativethread_lock_t *  lock)

Blocks until the current thread obtains a lock.

Parameters
[out]lockA mutex to lock.
Postcondition
lock is owned by the current native thread.

Definition at line 298 of file thread.c.

◆ rb_nativethread_lock_unlock()

void rb_nativethread_lock_unlock ( rb_nativethread_lock_t *  lock)

Releases a lock.

Parameters
[out]lockA mutex to unlock.
Precondition
lock is owned by the current native thread.
Postcondition
lock is not owned by the current native thread.

Definition at line 304 of file thread.c.

◆ rb_nativethread_self()

rb_nativethread_id_t rb_nativethread_self ( void  )

Queries the ID of the native thread that is calling this function.

Returns
The caller thread's native ID.