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1 #pragma once
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2
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3 class _critical_section_base {
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4 protected:
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5 CRITICAL_SECTION sec;
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6 public:
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7 _critical_section_base() = default;
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8 inline void enter() noexcept {EnterCriticalSection(&sec);}
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9 inline void leave() noexcept {LeaveCriticalSection(&sec);}
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10 inline void create() noexcept {
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11 #ifdef PFC_WINDOWS_DESKTOP_APP
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12 InitializeCriticalSection(&sec);
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13 #else
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14 InitializeCriticalSectionEx(&sec,0,0);
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15 #endif
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16 }
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17 inline void destroy() noexcept {DeleteCriticalSection(&sec);}
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18 inline bool tryEnter() noexcept { return !!TryEnterCriticalSection(&sec); }
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19 private:
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20 _critical_section_base(const _critical_section_base&) = delete;
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21 void operator=(const _critical_section_base&) = delete;
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22 };
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23
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24 // Static-lifetime critical section, no cleanup - valid until process termination
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25 class critical_section_static : public _critical_section_base {
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26 public:
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27 critical_section_static() noexcept {create();}
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28 #if !PFC_LEAK_STATIC_OBJECTS
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29 ~critical_section_static() noexcept {destroy();}
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30 #endif
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31 };
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32
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33 // Regular critical section, intended for any lifetime scopes
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34 class critical_section : public _critical_section_base {
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35 public:
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36 critical_section() noexcept {create();}
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37 ~critical_section() noexcept {destroy();}
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38 };
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39
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40 namespace pfc {
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41
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42 // Read write lock - Vista-and-newer friendly lock that allows concurrent reads from a resource that permits such
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43 // Warning, non-recursion proof
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44 class readWriteLock {
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45 public:
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46 readWriteLock() = default;
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47
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48 void enterRead() noexcept {
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49 AcquireSRWLockShared( & theLock );
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50 }
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51 void enterWrite() noexcept {
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52 AcquireSRWLockExclusive( & theLock );
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53 }
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54 void leaveRead() noexcept {
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55 ReleaseSRWLockShared( & theLock );
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56 }
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57 void leaveWrite() noexcept {
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58 ReleaseSRWLockExclusive( &theLock );
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59 }
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60
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61 private:
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62 readWriteLock(const readWriteLock&) = delete;
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63 void operator=(const readWriteLock&) = delete;
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64
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65 SRWLOCK theLock = SRWLOCK_INIT;
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66 };
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67
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68 typedef ::_critical_section_base mutexBase_t;
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69 typedef ::critical_section mutex;
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70
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71 }
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