Public Member Functions | |
PosixThreadBarrier (const unsigned int count, const char *name=0, void *arg=0) | |
~PosixThreadBarrier () | |
int | wait () |
Private Attributes | |
pthread_barrier_t | barrier |
Implementation of a thread barrier class, based on the POSIX thread functions. POSIX barriers are a relatively new feature and are not supported on all systems.
If the configuration detected the absence of these functions, then barriers will not be available, and creating objects of this class will result in an exception been thrown unless the count given for the parties waiting for the barrier is equal to one (as in this case waiting for the barrier is a no-operation, and we can dispense with the POSIX functions at all). The rest of the threading functionality will be available in its full extent, though, even if POSIX barriers are not available.
Threads::PosixThreadBarrier::PosixThreadBarrier | ( | const unsigned int | count, | |
const char * | name = 0 , |
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void * | arg = 0 | |||
) |
Constructor. Initialize the underlying POSIX barrier data structure.
Threads::PosixThreadBarrier::~PosixThreadBarrier | ( | ) |
Destructor. Release all resources.
int Threads::PosixThreadBarrier::wait | ( | ) |
Wait for all threads to reach this point. The return value is zero for all participating threads except for one, for which the return value is some non-zero value. The operating system picks the special thread by some not further known method.
pthread_barrier_t Threads::PosixThreadBarrier::barrier [private] |
Data object storing the POSIX data which we need to call the POSIX functions.