ardupilot/libraries/AP_HAL_SITL/Semaphores.h

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#pragma once
#include <AP_HAL/AP_HAL_Boards.h>
#include <stdint.h>
#include <AP_HAL/AP_HAL_Macros.h>
#include <AP_HAL/Semaphores.h>
#include "AP_HAL_SITL_Namespace.h"
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#include <pthread.h>
class HALSITL::Semaphore : public AP_HAL::Semaphore {
public:
Semaphore();
bool give() override;
bool take(uint32_t timeout_ms) override;
bool take_nonblocking() override;
protected:
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pthread_mutex_t _lock;
};