/// Create and Initialize a Mutex object.
/// \note API identical to osMutexNew
osMutexId_t svcRtxMutexNew (const osMutexAttr_t *attr) {
os_mutex_t *mutex;
uint32_t attr_bits;
uint8_t flags;
const char *name;
// Process attributes
if (attr != NULL) {
name = attr->name;
attr_bits = attr->attr_bits;
mutex = attr->cb_mem;
if (mutex != NULL) {
if (((uint32_t)mutex & 3U) || (attr->cb_size < sizeof(os_mutex_t))) {
EvrRtxMutexError(NULL, osRtxErrorInvalidControlBlock);
return NULL;
}
} else {
if (attr->cb_size != 0U) {
EvrRtxMutexError(NULL, osRtxErrorInvalidControlBlock);
return NULL;
}
}
} else {
name = NULL;
attr_bits = 0U;
mutex = NULL;
}
// Allocate object memory if not provided
if (mutex == NULL) {
if (osRtxInfo.mpi.mutex != NULL) {
mutex = osRtxMemoryPoolAlloc(osRtxInfo.mpi.mutex);
} else {
mutex = osRtxMemoryAlloc(osRtxInfo.mem.common, sizeof(os_mutex_t), 1U);
}
if (mutex == NULL) {
EvrRtxMutexError(NULL, osErrorNoMemory);
return NULL;
}
flags = osRtxFlagSystemObject;
} else {
flags = 0U;
}
// Initialize control block
mutex->id = osRtxIdMutex;
mutex->state = osRtxObjectActive;
mutex->flags = flags;
mutex->attr = (uint8_t)attr_bits;
mutex->name = name;
mutex->thread_list = NULL;
mutex->owner_thread = NULL;
mutex->owner_prev = NULL;
mutex->owner_next = NULL;
mutex->lock = 0U;
EvrRtxMutexCreated(mutex);
return mutex;
}
/// Create and Initialize a Mutex object.
/// \note API identical to osMutexNew
static osMutexId_t svcRtxMutexNew (const osMutexAttr_t *attr) {
os_mutex_t *mutex;
uint32_t attr_bits;
uint8_t flags;
const char *name;
// Process attributes
if (attr != NULL) {
name = attr->name;
attr_bits = attr->attr_bits;
//lint -e{9079} "conversion from pointer to void to pointer to other type" [MISRA Note 6]
mutex = attr->cb_mem;
if (mutex != NULL) {
//lint -e(923) -e(9078) "cast from pointer to unsigned int" [MISRA Note 7]
if ((((uint32_t)mutex & 3U) != 0U) || (attr->cb_size < sizeof(os_mutex_t))) {
EvrRtxMutexError(NULL, osRtxErrorInvalidControlBlock);
//lint -e{904} "Return statement before end of function" [MISRA Note 1]
return NULL;
}
} else {
if (attr->cb_size != 0U) {
EvrRtxMutexError(NULL, osRtxErrorInvalidControlBlock);
//lint -e{904} "Return statement before end of function" [MISRA Note 1]
return NULL;
}
}
} else {
name = NULL;
attr_bits = 0U;
mutex = NULL;
}
// Allocate object memory if not provided
if (mutex == NULL) {
if (osRtxInfo.mpi.mutex != NULL) {
//lint -e{9079} "conversion from pointer to void to pointer to other type" [MISRA Note 5]
mutex = osRtxMemoryPoolAlloc(osRtxInfo.mpi.mutex);
} else {
//lint -e{9079} "conversion from pointer to void to pointer to other type" [MISRA Note 5]
mutex = osRtxMemoryAlloc(osRtxInfo.mem.common, sizeof(os_mutex_t), 1U);
}
#if (defined(OS_OBJ_MEM_USAGE) && (OS_OBJ_MEM_USAGE != 0))
if (mutex != NULL) {
uint32_t used;
osRtxMutexMemUsage.cnt_alloc++;
used = osRtxMutexMemUsage.cnt_alloc - osRtxMutexMemUsage.cnt_free;
if (osRtxMutexMemUsage.max_used < used) {
osRtxMutexMemUsage.max_used = used;
}
}
#endif
flags = osRtxFlagSystemObject;
} else {
flags = 0U;
}
if (mutex != NULL) {
// Initialize control block
mutex->id = osRtxIdMutex;
mutex->flags = flags;
mutex->attr = (uint8_t)attr_bits;
mutex->name = name;
mutex->thread_list = NULL;
mutex->owner_thread = NULL;
mutex->owner_prev = NULL;
mutex->owner_next = NULL;
mutex->lock = 0U;
EvrRtxMutexCreated(mutex, mutex->name);
} else {
EvrRtxMutexError(NULL, (int32_t)osErrorNoMemory);
}
return mutex;
}
