ardupilot/libraries/AP_HAL/Semaphores.h

#pragma once

#include "AP_HAL_Namespace.h"

#define HAL_SEMAPHORE_BLOCK_FOREVER 0

class AP_HAL::Semaphore {
public:
    virtual bool take(uint32_t timeout_ms) WARN_IF_UNUSED = 0 ;
    virtual bool take_nonblocking() WARN_IF_UNUSED = 0;
    virtual bool give() = 0;
    virtual ~Semaphore(void) {}
};
AP_HAL: replace header guard with pragma once 2016-02-17 21:25:25 -04:00			`#pragma once`
AP_HAL: move AP_Semaphore to be part of the HAL 2012-11-28 21:53:15 -04:00
AP_HAL: standardize inclusion of libaries headers This commit changes the way libraries headers are included in source files: - If the header is in the same directory the source belongs to, so the notation '#include ""' is used with the path relative to the directory containing the source. - If the header is outside the directory containing the source, then we use the notation '#include <>' with the path relative to libraries folder. Some of the advantages of such approach: - Only one search path for libraries headers. - OSs like Windows may have a better lookup time. 2015-08-11 03:28:43 -03:00			`#include "AP_HAL_Namespace.h"`
AP_HAL: move AP_Semaphore to be part of the HAL 2012-11-28 21:53:15 -04:00
AP_HAL: fixed HAL_SEMAPHORE_BLOCK_FOREVER to be zero all implementations assume this 2016-11-03 07:32:09 -03:00			`#define HAL_SEMAPHORE_BLOCK_FOREVER 0`
AP_HAL: move AP_Semaphore to be part of the HAL 2012-11-28 21:53:15 -04:00
AP_HAL: New semaphore interface * it now looks like a semaphore! 2013-01-02 20:27:01 -04:00			`class AP_HAL::Semaphore {`
			`public:`
AP_HAL: mark semaphore take operations as WARN_IF_UNUSED this prevents common bugs 2013-01-09 05:42:02 -04:00			`virtual bool take(uint32_t timeout_ms) WARN_IF_UNUSED = 0 ;`
			`virtual bool take_nonblocking() WARN_IF_UNUSED = 0;`
AP_HAL: New semaphore interface * it now looks like a semaphore! 2013-01-02 20:27:01 -04:00			`virtual bool give() = 0;`
AP_HAL: added virtual destructor for Semaphores 2016-11-19 01:47:50 -04:00			`virtual ~Semaphore(void) {}`
AP_HAL: move AP_Semaphore to be part of the HAL 2012-11-28 21:53:15 -04:00			`};`