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https://github.com/wpilibsuite/allwpilib
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40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
/*----------------------------------------------------------------------------*/
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/* Copyright (c) FIRST 2008. All Rights Reserved. */
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/* Open Source Software - may be modified and shared by FRC teams. The code */
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/* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib. */
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/*----------------------------------------------------------------------------*/
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#pragma once
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#include "ErrorBase.h"
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#include "HAL/cpp/Synchronized.hpp"
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/**
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* The Resource class is a convenient way to track allocated resources.
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* It tracks them as indicies in the range [0 .. elements - 1].
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* E.g. the library uses this to track hardware channel allocation.
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*
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* The Resource class does not allocate the hardware channels or other
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* resources; it just tracks which indices were marked in use by
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* Allocate and not yet freed by Free.
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*/
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class Resource : public ErrorBase
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{
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public:
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virtual ~Resource();
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static void CreateResourceObject(Resource **r, uint32_t elements);
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uint32_t Allocate(const char *resourceDesc);
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uint32_t Allocate(uint32_t index, const char *resourceDesc);
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void Free(uint32_t index);
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private:
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explicit Resource(uint32_t size);
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bool *m_isAllocated;
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ReentrantSemaphore m_allocateLock;
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uint32_t m_size;
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static ReentrantSemaphore m_createLock;
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DISALLOW_COPY_AND_ASSIGN(Resource);
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};
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