#include <Process_Semaphore.h>
Public Member Functions | |
ACE_Process_Semaphore (u_int count=1, const ACE_TCHAR *name=0, void *=0, int max=0x7FFFFFFF) | |
int | remove (void) |
int | acquire (void) |
int | tryacquire (void) |
int | release (void) |
Increment the semaphore, potentially unblocking a waiting thread. | |
int | acquire_read (void) |
int | acquire_write (void) |
int | tryacquire_read (void) |
int | tryacquire_write (void) |
int | tryacquire_write_upgrade (void) |
const ACE_sema_t & | lock (void) const |
Return the underlying lock. | |
void | dump (void) const |
Dump the state of an object. | |
Public Attributes | |
ACE_ALLOC_HOOK_DECLARE | |
Declare the dynamic allocation hooks. | |
Protected Attributes | |
ACE_Semaphore | lock_ |
ACE_Process_Semaphore::ACE_Process_Semaphore | ( | u_int | count = 1 , |
|
const ACE_TCHAR * | name = 0 , |
|||
void * | arg = 0 , |
|||
int | max = 0x7FFFFFFF | |||
) |
Initialize the semaphore, with an initial value of count and a maximum value of max.
int ACE_Process_Semaphore::remove | ( | void | ) |
Explicitly destroy the semaphore. Note that only one thread should call this method since it doesn't protect against race conditions.
int ACE_Process_Semaphore::acquire | ( | void | ) |
Block the thread until the semaphore count becomes greater than 0, then decrement it.
int ACE_Process_Semaphore::tryacquire | ( | void | ) |
Conditionally decrement the semaphore if count is greater than 0 (i.e., won't block). Returns -1 on failure. If we "failed" because someone else already had the lock, errno
is set to EBUSY
.
int ACE_Process_Semaphore::release | ( | void | ) |
Increment the semaphore, potentially unblocking a waiting thread.
ACE_BEGIN_VERSIONED_NAMESPACE_DECL ACE_INLINE int ACE_Process_Semaphore::acquire_read | ( | void | ) |
Acquire semaphore ownership. This calls <acquire> and is only here to make the ACE_Process_Semaphore interface consistent with the other synchronization APIs.
ACE_INLINE int ACE_Process_Semaphore::acquire_write | ( | void | ) |
Acquire semaphore ownership. This calls <acquire> and is only here to make the ACE_Process_Semaphore interface consistent with the other synchronization APIs.
ACE_INLINE int ACE_Process_Semaphore::tryacquire_read | ( | void | ) |
Conditionally acquire semaphore (i.e., won't block). This calls <tryacquire> and is only here to make the ACE_Process_Semaphore interface consistent with the other synchronization APIs. Returns -1 on failure. If we "failed" because someone else already had the lock, errno
is set to EBUSY
.
ACE_INLINE int ACE_Process_Semaphore::tryacquire_write | ( | void | ) |
Conditionally acquire semaphore (i.e., won't block). This calls <tryacquire> and is only here to make the ACE_Process_Semaphore interface consistent with the other synchronization APIs. Returns -1 on failure. If we "failed" because someone else already had the lock, errno
is set to EBUSY
.
ACE_INLINE int ACE_Process_Semaphore::tryacquire_write_upgrade | ( | void | ) |
This is only here to make the ACE_Process_Semaphore interface consistent with the other synchronization APIs. Assumes the caller has already acquired the semaphore using one of the above calls, and returns 0 (success) always.
const ACE_sema_t& ACE_Process_Semaphore::lock | ( | void | ) | const |
Return the underlying lock.
ACE_BEGIN_VERSIONED_NAMESPACE_DECL void ACE_Process_Semaphore::dump | ( | void | ) | const |
Dump the state of an object.
Declare the dynamic allocation hooks.
ACE_Semaphore ACE_Process_Semaphore::lock_ [protected] |