47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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#include "queue.h"
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#include <stdexcept>
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#include <SDL2/SDL.h>
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QueueHandle_t xQueueCreate(const UBaseType_t uxQueueLength, const UBaseType_t uxItemSize)
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{
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QueueHandle_t xQueue;
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if (uxItemSize != 1) {
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throw std::runtime_error("uxItemSize must be 1");
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}
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xQueue.queue.reserve(uxQueueLength);
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return xQueue;
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}
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BaseType_t xQueueSend(QueueHandle_t &xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait)
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{
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std::lock_guard<std::mutex> guard(xQueue.mutex);
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xQueue.queue.push_back(*reinterpret_cast<const uint8_t *const>(pvItemToQueue));
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return true;
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}
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BaseType_t xQueueSendFromISR(QueueHandle_t &xQueue, const void * const pvItemToQueue, BaseType_t *xHigherPriorityTaskWoken)
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{
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TickType_t xTicksToWait = 0;
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*xHigherPriorityTaskWoken = pdFALSE;
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return xQueueSend(xQueue, pvItemToQueue, 0.0);
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}
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BaseType_t xQueueReceive(QueueHandle_t &xQueue, void * const pvBuffer, TickType_t xTicksToWait)
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{
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while (xQueue.queue.empty()) {
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if (xTicksToWait <= 25) {
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return false;
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}
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SDL_Delay(25);
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xTicksToWait -= 25;
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}
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if (xQueue.queue.empty()) {
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return false;
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}
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std::lock_guard<std::mutex> guard(xQueue.mutex);
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uint8_t *buf = reinterpret_cast<uint8_t * const>(pvBuffer);
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*buf = xQueue.queue.at(0);
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xQueue.queue.erase(xQueue.queue.begin());
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return true;
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}
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