Move Mutexy things to private.

include/core/SkMutex.h

-/*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#ifndef SkMutex_DEFINED
-#define SkMutex_DEFINED
-
-// This file is not part of the public Skia API.
-#include "../private/SkSemaphore.h"
-#include "SkTypes.h"
-
-#define SK_MUTEX_SEMAPHORE_INIT {1, {0}}
-
-#ifdef SK_DEBUG
-    #define SK_BASE_MUTEX_INIT {SK_MUTEX_SEMAPHORE_INIT, 0}
-#else
-    #define SK_BASE_MUTEX_INIT {SK_MUTEX_SEMAPHORE_INIT}
-#endif
-
-// Using POD-style initialization prevents the generation of a static initializer.
-//
-// Without magic statics there are no thread safety guarantees on initialization
-// of local statics (even POD). As a result, it is illegal to use
-// SK_DECLARE_STATIC_MUTEX in a function.
-//
-// Because SkBaseMutex is not a primitive, a static SkBaseMutex cannot be
-// initialized in a class with this macro.
-#define SK_DECLARE_STATIC_MUTEX(name) namespace {} static SkBaseMutex name = SK_BASE_MUTEX_INIT;
-
-// TODO(herb): unify this with the ThreadID in SkSharedMutex.cpp.
-#ifdef SK_DEBUG
-    #ifdef SK_BUILD_FOR_WIN
-        #include <windows.h>
-        inline int64_t sk_get_thread_id() { return GetCurrentThreadId(); }
-    #else
-        #include <pthread.h>
-        inline int64_t sk_get_thread_id() { return (int64_t)pthread_self(); }
-    #endif
-#endif
-
-typedef int64_t SkThreadID;
-
-SkDEBUGCODE(static const SkThreadID kNoOwner = 0;)
-
-struct SkBaseMutex {
-    void acquire() {
-        fSemaphore.wait();
-        SkDEBUGCODE(fOwner = sk_get_thread_id();)
-    }
-
-    void release() {
-        this->assertHeld();
-        SkDEBUGCODE(fOwner = kNoOwner;)
-        fSemaphore.signal();
-    }
-
-    void assertHeld() {
-        SkASSERT(fOwner == sk_get_thread_id());
-    }
-
-    SkBaseSemaphore fSemaphore;
-    SkDEBUGCODE(SkThreadID fOwner;)
-};
-
-// This needs to use subclassing instead of encapsulation to make SkAutoMutexAcquire to work.
-class SkMutex : public SkBaseMutex {
-public:
-    SkMutex () {
-        fSemaphore = SK_MUTEX_SEMAPHORE_INIT;
-        SkDEBUGCODE(fOwner = kNoOwner);
-    }
-    ~SkMutex () { fSemaphore.deleteSemaphore(); }
-    SkMutex(const SkMutex&) = delete;
-    SkMutex& operator=(const SkMutex&) = delete;
-};
-
-template <typename Lock>
-class SkAutoTAcquire : SkNoncopyable {
-public:
-    explicit SkAutoTAcquire(Lock& mutex) : fMutex(&mutex) {
-        SkASSERT(fMutex != NULL);
-        mutex.acquire();
-    }
-
-    explicit SkAutoTAcquire(Lock* mutex) : fMutex(mutex) {
-        if (mutex) {
-            mutex->acquire();
-        }
-    }
-
-    /** If the mutex has not been released, release it now. */
-    ~SkAutoTAcquire() {
-        if (fMutex) {
-            fMutex->release();
-        }
-    }
-
-    /** If the mutex has not been released, release it now. */
-    void release() {
-        if (fMutex) {
-            fMutex->release();
-            fMutex = NULL;
-        }
-    }
-
-    /** Assert that we're holding the mutex. */
-    void assertHeld() {
-        SkASSERT(fMutex);
-        fMutex->assertHeld();
-    }
-
-private:
-    Lock* fMutex;
-};
-
-typedef SkAutoTAcquire<SkBaseMutex> SkAutoMutexAcquire;
-#define SkAutoMutexAcquire(...) SK_REQUIRE_LOCAL_VAR(SkAutoMutexAcquire)
-
-#endif//SkMutex_DEFINED