80 lines
2.2 KiB
C++
80 lines
2.2 KiB
C++
#include "Mutex.h"
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#include <framework/serviceinterface/ServiceInterfaceStream.h>
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const uint32_t MutexIF::BLOCKING = RTEMS_WAIT;
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const uint32_t MutexIF::POLLING = RTEMS_NO_WAIT;
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uint8_t Mutex::count = 0;
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Mutex::Mutex() :
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mutexId(0) {
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rtems_name mutexName = ('M' << 24) + ('T' << 16) + ('X' << 8) + count++;
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rtems_status_code status = rtems_semaphore_create(mutexName, 1,
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RTEMS_BINARY_SEMAPHORE | RTEMS_PRIORITY | RTEMS_INHERIT_PRIORITY, 0,
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&mutexId);
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if (status != RTEMS_SUCCESSFUL) {
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error << "Mutex: creation with name, id " << mutexName << ", " << mutexId
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<< " failed with " << status << std::endl;
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}
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}
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Mutex::~Mutex() {
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rtems_status_code status = rtems_semaphore_delete(mutexId);
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if (status != RTEMS_SUCCESSFUL) {
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error << "Mutex: deletion for id " << mutexId
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<< " failed with " << status << std::endl;
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}
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}
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ReturnValue_t Mutex::lockMutex(uint32_t timeoutMs) {
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if(timeoutMs == MutexIF::BLOCKING) {
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rtems_status_code status = rtems_semaphore_obtain(mutexId,
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RTEMS_WAIT, timeoutMs);
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}
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else if(timeoutMs == MutexIF::POLLING) {
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timeoutMs = RTEMS_NO_TIMEOUT;
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rtems_status_code status = rtems_semaphore_obtain(mutexId,
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RTEMS_NO_WAIT, timeoutMs);
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}
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else {
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rtems_status_code status = rtems_semaphore_obtain(mutexId,
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RTEMS_NO_WAIT, timeoutMs);
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}
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switch(status){
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case RTEMS_SUCCESSFUL:
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//semaphore obtained successfully
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return HasReturnvaluesIF::RETURN_OK;
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case RTEMS_UNSATISFIED:
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//semaphore not available
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return MUTEX_NOT_FOUND;
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case RTEMS_TIMEOUT:
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//timed out waiting for semaphore
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return MUTEX_TIMEOUT;
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case RTEMS_OBJECT_WAS_DELETED:
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//semaphore deleted while waiting
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return MUTEX_DESTROYED_WHILE_WAITING;
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case RTEMS_INVALID_ID:
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//invalid semaphore id
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return MUTEX_INVALID_ID;
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default:
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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}
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ReturnValue_t Mutex::unlockMutex() {
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rtems_status_code status = rtems_semaphore_release(mutexId);
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switch(status){
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case RTEMS_SUCCESSFUL:
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//semaphore obtained successfully
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return HasReturnvaluesIF::RETURN_OK;
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case RTEMS_NOT_OWNER_OF_RESOURCE:
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//semaphore not available
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return CURR_THREAD_DOES_NOT_OWN_MUTEX;
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case RTEMS_INVALID_ID:
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//invalid semaphore id
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return MUTEX_INVALID_ID;
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default:
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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}
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