ACE  6.3.4
Public Member Functions | Public Attributes | Protected Member Functions | Protected Attributes | Private Member Functions | List of all members
ACE_Recursive_Thread_Mutex Class Reference

Implement a C++ wrapper that allows nested acquisition and release of a mutex that occurs in the same thread. More...

#include <Recursive_Thread_Mutex.h>

Collaboration diagram for ACE_Recursive_Thread_Mutex:
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Public Member Functions

 ACE_Recursive_Thread_Mutex (const ACE_TCHAR *name=0, ACE_mutexattr_t *arg=0)
 Initialize a recursive mutex. More...
 
 ~ACE_Recursive_Thread_Mutex (void)
 Implicitly release a recursive mutex. More...
 
int remove (void)
 
int acquire (void)
 
int acquire (ACE_Time_Value &tv)
 
int acquire (ACE_Time_Value *tv)
 
int tryacquire (void)
 
int acquire_read (void)
 
int acquire_write (void)
 
int tryacquire_read (void)
 
int tryacquire_write (void)
 
int tryacquire_write_upgrade (void)
 
int release (void)
 
ACE_thread_t get_thread_id (void)
 Return the id of the thread that currently owns the mutex. More...
 
int get_nesting_level (void)
 
ACE_recursive_thread_mutex_tlock (void)
 Returns a reference to the recursive mutex;. More...
 
ACE_thread_mutex_t & get_nesting_mutex (void)
 Returns a reference to the recursive mutex's internal mutex;. More...
 
void dump (void) const
 Dump the state of an object. More...
 

Public Attributes

 ACE_ALLOC_HOOK_DECLARE
 Declare the dynamic allocation hooks. More...
 

Protected Member Functions

void set_thread_id (ACE_thread_t t)
 

Protected Attributes

ACE_recursive_thread_mutex_t lock_
 Recursive mutex. More...
 
bool removed_
 

Private Member Functions

void operator= (const ACE_Recursive_Thread_Mutex &)
 
 ACE_Recursive_Thread_Mutex (const ACE_Recursive_Thread_Mutex &)
 

Detailed Description

Implement a C++ wrapper that allows nested acquisition and release of a mutex that occurs in the same thread.

Constructor & Destructor Documentation

ACE_Recursive_Thread_Mutex::ACE_Recursive_Thread_Mutex ( const ACE_TCHAR name = 0,
ACE_mutexattr_t *  arg = 0 
)

Initialize a recursive mutex.

ACE_Recursive_Thread_Mutex::~ACE_Recursive_Thread_Mutex ( void  )

Implicitly release a recursive mutex.

ACE_Recursive_Thread_Mutex::ACE_Recursive_Thread_Mutex ( const ACE_Recursive_Thread_Mutex )
private

Member Function Documentation

int ACE_Recursive_Thread_Mutex::acquire ( void  )
inline

Acquire a recursive mutex (will increment the nesting level and not deadmutex if the owner of the mutex calls this method more than once).

int ACE_Recursive_Thread_Mutex::acquire ( ACE_Time_Value tv)
inline

Block the thread until we acquire the mutex or until tv times out, in which case -1 is returned with errno == ETIME. Note that tv is assumed to be in "absolute" rather than "relative" time. The value of tv is updated upon return to show the actual (absolute) acquisition time.

int ACE_Recursive_Thread_Mutex::acquire ( ACE_Time_Value tv)
inline

If tv == 0 the call acquire() directly. Otherwise, Block the thread until we acquire the mutex or until tv times out, in which case -1 is returned with errno == ETIME. Note that <*tv> is assumed to be in "absolute" rather than "relative" time. The value of <*tv> is updated upon return to show the actual (absolute) acquisition time.

int ACE_Recursive_Thread_Mutex::acquire_read ( void  )
inline

Acquire mutex ownership. This calls acquire() and is only here to make the ACE_Recusive_Thread_Mutex interface consistent with the other synchronization APIs.

int ACE_Recursive_Thread_Mutex::acquire_write ( void  )
inline

Acquire mutex ownership. This calls acquire() and is only here to make the ACE_Recusive_Thread_Mutex interface consistent with the other synchronization APIs.

void ACE_Recursive_Thread_Mutex::dump ( void  ) const

Dump the state of an object.

int ACE_Recursive_Thread_Mutex::get_nesting_level ( void  )

Return the nesting level of the recursion. When a thread has acquired the mutex for the first time, the nesting level == 1. The nesting level is incremented every time the thread acquires the mutex recursively. Note that if the ACE_HAS_RECURSIVE_MUTEXES macro is enabled then this method may return -1 on platforms that do not expose the internal count.

ACE_thread_mutex_t & ACE_Recursive_Thread_Mutex::get_nesting_mutex ( void  )
inline

Returns a reference to the recursive mutex's internal mutex;.

ACE_thread_t ACE_Recursive_Thread_Mutex::get_thread_id ( void  )

Return the id of the thread that currently owns the mutex.

ACE_recursive_thread_mutex_t & ACE_Recursive_Thread_Mutex::lock ( void  )
inline

Returns a reference to the recursive mutex;.

void ACE_Recursive_Thread_Mutex::operator= ( const ACE_Recursive_Thread_Mutex )
private
int ACE_Recursive_Thread_Mutex::release ( void  )
inline

Releases a recursive mutex (will not release mutex until all the nesting level drops to 0, which means the mutex is no longer held).

int ACE_Recursive_Thread_Mutex::remove ( void  )

Implicitly release a recursive mutex. Note that only one thread should call this method since it doesn't protect against race conditions.

void ACE_Recursive_Thread_Mutex::set_thread_id ( ACE_thread_t  t)
inlineprotected
int ACE_Recursive_Thread_Mutex::tryacquire ( void  )
inline

Conditionally acquire a recursive mutex (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_Recursive_Thread_Mutex::tryacquire_read ( void  )
inline

Conditionally acquire mutex (i.e., won't block). This calls tryacquire() and is only here to make the ACE_Recusive_Thread_Mutex 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.

int ACE_Recursive_Thread_Mutex::tryacquire_write ( void  )
inline

Conditionally acquire mutex (i.e., won't block). This calls tryacquire() and is only here to make the ACE_Recusive_Thread_Mutex 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.

int ACE_Recursive_Thread_Mutex::tryacquire_write_upgrade ( void  )
inline

This is only here to make the ACE_Recursive_Thread_Mutex interface consistent with the other synchronization APIs. Assumes the caller has already acquired the mutex using one of the above calls, and returns 0 (success) always.

Member Data Documentation

ACE_Recursive_Thread_Mutex::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

ACE_recursive_thread_mutex_t ACE_Recursive_Thread_Mutex::lock_
protected

Recursive mutex.

bool ACE_Recursive_Thread_Mutex::removed_
protected

Keeps track of whether remove() has been called yet to avoid multiple remove() calls, e.g., explicitly and implicitly in the destructor. This flag isn't protected by a lock, so make sure that you don't have multiple threads simultaneously calling remove() on the same object, which is a bad idea anyway...


The documentation for this class was generated from the following files: