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| 1 | #include <windows.h> | |
| 2 | ||
| 3 | class CriticalSection | |
| 4 | {
| |
| 5 | public: | |
| 6 | CriticalSection() | |
| 7 | {
| |
| 8 | InitializeCriticalSection(&m_cs); | |
| 9 | } | |
| 10 | ~CriticalSection() | |
| 11 | {
| |
| 12 | DeleteCriticalSection(&m_cs); | |
| 13 | } | |
| 14 | void enterCriticalSection() | |
| 15 | {
| |
| 16 | EnterCriticalSection(&m_cs); | |
| 17 | } | |
| 18 | void leaveCriticalSection() | |
| 19 | {
| |
| 20 | LeaveCriticalSection(&m_cs); | |
| 21 | } | |
| 22 | protected: | |
| 23 | private: | |
| 24 | CRITICAL_SECTION m_cs; | |
| 25 | }; | |
| 26 | ||
| 27 | template<class T> | |
| 28 | class SharedMemory | |
| 29 | {
| |
| 30 | public: | |
| 31 | SharedMemory() { m_empty = true;}
| |
| 32 | ~SharedMemory() {}
| |
| 33 | ||
| 34 | T getData(bool& validreturn) | |
| 35 | {
| |
| 36 | m_cs.enterCriticalSection(); | |
| 37 | if (m_empty) | |
| 38 | {
| |
| 39 | m_cs.leaveCriticalSection(); | |
| 40 | validreturn = false; | |
| 41 | return T(); | |
| 42 | } | |
| 43 | //Data in the shared memory | |
| 44 | T data = m_data; | |
| 45 | m_empty = true; | |
| 46 | m_cs.leaveCriticalSection(); | |
| 47 | validreturn = true; | |
| 48 | return data; | |
| 49 | } | |
| 50 | bool setData(const T& data) | |
| 51 | {
| |
| 52 | m_cs.enterCriticalSection(); | |
| 53 | if (!m_empty) | |
| 54 | {
| |
| 55 | m_cs.leaveCriticalSection(); | |
| 56 | return false; | |
| 57 | } | |
| 58 | //Shared memory is empty so fill it | |
| 59 | m_data = data; | |
| 60 | m_empty = false; | |
| 61 | m_cs.leaveCriticalSection(); | |
| 62 | return true; | |
| 63 | } | |
| 64 | protected: | |
| 65 | private: | |
| 66 | T m_data; | |
| 67 | bool m_empty; | |
| 68 | CriticalSection m_cs; | |
| 69 | }; |
