ardupilot/libraries/AP_HAL_Empty/Semaphores.cpp

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#include "Semaphores.h"
using namespace Empty;
bool Semaphore::give() {
if (_taken) {
_taken = false;
return true;
} else {
return false;
}
}
bool Semaphore::take(uint32_t timeout_ms) {
return take_nonblocking();
}
bool Semaphore::take_nonblocking() {
/* No syncronisation primitives to garuntee this is correct */
if (!_taken) {
_taken = true;
return true;
} else {
return false;
}
}