UCommon
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A portable implementation of "barrier" thread sychronization. More...
#include <condition.h>
Public Member Functions | |
Barrier (unsigned count) | |
Construct a barrier with an initial size. | |
void | dec (void) |
Reduce the number of threads required. | |
void | inc (void) |
Dynamically increment the number of threads required. | |
unsigned | operator++ (void) |
Alternative prefix form of the same increment operation. | |
unsigned | operator-- (void) |
void | set (unsigned count) |
Dynamically alter the number of threads required. | |
bool | wait (timeout_t timeout) |
Wait at the barrier until either the count of threads waiting is reached or a timeout has occurred. | |
void | wait (void) |
Wait at the barrier until the count of threads waiting is reached. | |
~Barrier () | |
Destroy barrier and release pending threads. | |
A portable implementation of "barrier" thread sychronization.
A barrier waits until a specified number of threads have all reached the barrier, and then releases all the threads together. This implementation works regardless of whether the thread library supports barriers since it is built from conditional. It also differs in that the number of threads required can be changed dynamically at runtime, unlike pthread barriers which, when supported, have a fixed limit defined at creation time. Since we use conditionals, another feature we can add is optional support for a wait with timeout.
Definition at line 588 of file condition.h.
ucommon::Barrier::Barrier | ( | unsigned | count | ) |
Construct a barrier with an initial size.
count | of threads required. |
unsigned ucommon::Barrier::operator++ | ( | void | ) |
Alternative prefix form of the same increment operation.
void ucommon::Barrier::set | ( | unsigned | count | ) |
Dynamically alter the number of threads required.
If the size is set below the currently waiting threads, then the barrier releases.
count | of threads required. |
bool ucommon::Barrier::wait | ( | timeout_t | timeout | ) |
Wait at the barrier until either the count of threads waiting is reached or a timeout has occurred.
timeout | to wait in milliseconds. |