| jerrym | f157933 | 2013-02-07 01:56:28 +0000 | [diff] [blame] | 1 | /*----------------------------------------------------------------------------*/
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| 2 | /* Copyright (c) FIRST 2008. All Rights Reserved. */
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| 3 | /* Open Source Software - may be modified and shared by FRC teams. The code */
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| 4 | /* must be accompanied by the FIRST BSD license file in $(WIND_BASE)/WPILib. */
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| 5 | /*----------------------------------------------------------------------------*/
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| 6 |
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| 7 | #ifndef RESOURCE_H_
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| 8 | #define RESOURCE_H_
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| 9 |
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| 10 | #include "ErrorBase.h"
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| 11 | #include "Synchronized.h"
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| 12 | #include <vxWorks.h>
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| 13 |
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| 14 | /**
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| 15 | * The Resource class is a convenient way to track allocated resources.
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| 16 | * It tracks them as indicies in the range [0 .. elements - 1].
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| 17 | * E.g. the library uses this to track hardware channel allocation.
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| 18 | *
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| 19 | * The Resource class does not allocate the hardware channels or other
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| 20 | * resources; it just tracks which indices were marked in use by
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| 21 | * Allocate and not yet freed by Free.
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| 22 | */
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| 23 | class Resource : public ErrorBase
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| 24 | {
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| 25 | public:
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| 26 | virtual ~Resource();
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| 27 | static void CreateResourceObject(Resource **r, UINT32 elements);
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| 28 | UINT32 Allocate(const char *resourceDesc);
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| 29 | UINT32 Allocate(UINT32 index, const char *resourceDesc);
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| 30 | void Free(UINT32 index);
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| 31 |
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| 32 | private:
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| 33 | explicit Resource(UINT32 size);
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| 34 |
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| 35 | bool *m_isAllocated;
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| 36 | ReentrantSemaphore m_allocateLock;
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| 37 | UINT32 m_size;
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| 38 |
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| 39 | static ReentrantSemaphore m_createLock;
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| 40 |
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| 41 | DISALLOW_COPY_AND_ASSIGN(Resource);
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| 42 | };
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| 43 |
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| 44 | #endif
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