ACE_RW_Thread_Mutex(3)

NAME

ACE_RW_Thread_Mutex - Wrapper for readers/writer locks that exist within a process.

SYNOPSIS

#include <ace/Synch.h>
class ACE_RW_Thread_Mutex : public ACE_RW_Mutex
{
  public:
    ACE_RW_Thread_Mutex (LPCTSTR name = 0, void *arg = 0);
    ~ACE_RW_Thread_Mutex (void);
    int tryacquire_write_upgrade (void);
    void dump (void) const;
    ACE_ALLOC_HOOK_DECLARE;
};

DESCRIPTION

Wrappers for various synchronization routines.

PUBLIC MEMBERS

ACE_RW_Thread_Mutex (LPCTSTR name = 0, void *arg = 0);

~ACE_RW_Thread_Mutex (void);

Default dtor.

int tryacquire_write_upgrade (void);

Conditionally upgrade a read lock to a write lock. This only works if there are no other readers present, in which case the method returns 0. Otherwise, the method returns -1 and sets errno to EBUSY. Note that the caller of this method *must* already possess this lock as a read lock (but this condition is not checked by the current implementation).

void dump (void) const;

Dump the state of an object.

ACE_ALLOC_HOOK_DECLARE;

Declare the dynamic allocation hooks.

AUTHOR

Doug Schmidt

LIBRARY

ace