split libsurfaceflinger_client and libcamera_client out of libui

1 files changed, 0 insertions, 359 deletions

diff --git a/include/private/ui/SharedBufferStack.h b/include/private/ui/SharedBufferStack.h
deleted file mode 100644
index bbc1822..0000000
--- a/include/private/ui/SharedBufferStack.h
+++ /dev/null
@@ -1,359 +0,0 @@
-/*
- * Copyright (C) 2007 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#ifndef ANDROID_UI_SHARED_BUFFER_STACK_H
-#define ANDROID_UI_SHARED_BUFFER_STACK_H
-
-#include <stdint.h>
-#include <sys/types.h>
-
-#include <cutils/compiler.h>
-
-#include <utils/Debug.h>
-#include <utils/threads.h>
-#include <utils/String8.h>
-
-#include <ui/Rect.h>
-
-namespace android {
-// ---------------------------------------------------------------------------
-
-/*
- * These classes manage a stack of buffers in shared memory.
- * 
- * SharedClient: represents a client with several stacks
- * SharedBufferStack: represents a stack of buffers
- * SharedBufferClient: manipulates the SharedBufferStack from the client side 
- * SharedBufferServer: manipulates the SharedBufferStack from the server side 
- *
- * Buffers can be dequeued until there are none available, they can be locked
- * unless they are in use by the server, which is only the case for the last 
- * dequeue-able buffer. When these various conditions are not met, the caller
- * waits until the condition is met.
- *
- * 
- * CAVEATS:
- * 
- * In the current implementation there are several limitations:
- * - buffers must be locked in the same order they've been dequeued
- * - buffers must be enqueued in the same order they've been locked
- * - dequeue() is not reentrant
- * - no error checks are done on the condition above
- * 
- */
-
-// When changing these values, the COMPILE_TIME_ASSERT at the end of this
-// file need to be updated.
-const unsigned int NUM_LAYERS_MAX  = 31;
-const unsigned int NUM_BUFFER_MAX  = 4;
-const unsigned int NUM_DISPLAY_MAX = 4;
-
-// ----------------------------------------------------------------------------
-
-class Region;
-class SharedBufferStack;
-class SharedClient;
-
-// ----------------------------------------------------------------------------
-
-// should be 128 bytes (32 longs)
-class SharedBufferStack
-{
-    friend class SharedClient;
-    friend class SharedBufferBase;
-    friend class SharedBufferClient;
-    friend class SharedBufferServer;
-
-public:
-    struct FlatRegion { // 12 bytes
-        static const unsigned int NUM_RECT_MAX = 1;
-        uint32_t    count;
-        uint16_t    rects[4*NUM_RECT_MAX];
-    };
-    
-    struct Statistics { // 4 longs
-        typedef int32_t usecs_t;
-        usecs_t  totalTime;
-        usecs_t  reserved[3];
-    };
-    
-    SharedBufferStack();
-    void init(int32_t identity);
-    status_t setDirtyRegion(int buffer, const Region& reg);
-    Region getDirtyRegion(int buffer) const;
-
-    // these attributes are part of the conditions/updates
-    volatile int32_t head;      // server's current front buffer
-    volatile int32_t available; // number of dequeue-able buffers
-    volatile int32_t queued;    // number of buffers waiting for post
-    volatile int32_t inUse;     // buffer currently in use by SF
-    volatile status_t status;   // surface's status code
-
-    // not part of the conditions
-    volatile int32_t reallocMask;
-
-    int32_t     identity;       // surface's identity (const)
-    int32_t     reserved32[9];
-    Statistics  stats;
-    FlatRegion  dirtyRegion[NUM_BUFFER_MAX];    // 12*4=48 bytes
-};
-
-// ----------------------------------------------------------------------------
-
-// 4 KB max
-class SharedClient
-{
-public:
-    SharedClient();
-    ~SharedClient();
-
-    status_t validate(size_t token) const;
-    uint32_t getIdentity(size_t token) const;
-
-private:
-    friend class SharedBufferBase;
-    friend class SharedBufferClient;
-    friend class SharedBufferServer;
-
-    // FIXME: this should be replaced by a lock-less primitive
-    Mutex lock;
-    Condition cv;
-    SharedBufferStack surfaces[ NUM_LAYERS_MAX ];
-};
-
-// ============================================================================
-
-class SharedBufferBase
-{
-public:
-    SharedBufferBase(SharedClient* sharedClient, int surface, int num,
-            int32_t identity);
-    ~SharedBufferBase();
-    uint32_t getIdentity();
-    status_t getStatus() const;
-    size_t getFrontBuffer() const;
-    String8 dump(char const* prefix) const;
-
-protected:
-    SharedClient* const mSharedClient;
-    SharedBufferStack* const mSharedStack;
-    const int mNumBuffers;
-    const int mIdentity;
-
-    friend struct Update;
-    friend struct QueueUpdate;
-
-    struct ConditionBase {
-        SharedBufferStack& stack;
-        inline ConditionBase(SharedBufferBase* sbc) 
-            : stack(*sbc->mSharedStack) { }
-    };
-
-    struct UpdateBase {
-        SharedBufferStack& stack;
-        inline UpdateBase(SharedBufferBase* sbb) 
-            : stack(*sbb->mSharedStack) { }
-    };
-
-    template <typename T>
-    status_t waitForCondition(T condition);
-
-    template <typename T>
-    status_t updateCondition(T update);
-};
-
-template <typename T>
-status_t SharedBufferBase::waitForCondition(T condition) 
-{
-    const SharedBufferStack& stack( *mSharedStack );
-    SharedClient& client( *mSharedClient );
-    const nsecs_t TIMEOUT = s2ns(1);
-    Mutex::Autolock _l(client.lock);
-    while ((condition()==false) &&
-            (stack.identity == mIdentity) &&
-            (stack.status == NO_ERROR))
-    {
-        status_t err = client.cv.waitRelative(client.lock, TIMEOUT);
-        
-        // handle errors and timeouts
-        if (CC_UNLIKELY(err != NO_ERROR)) {
-            if (err == TIMED_OUT) {
-                if (condition()) {
-                    LOGE("waitForCondition(%s) timed out (identity=%d), "
-                        "but condition is true! We recovered but it "
-                        "shouldn't happen." , T::name(),
-                        stack.identity);
-                    break;
-                } else {
-                    LOGW("waitForCondition(%s) timed out "
-                        "(identity=%d, status=%d). "
-                        "CPU may be pegged. trying again.", T::name(),
-                        stack.identity, stack.status);
-                }
-            } else {
-                LOGE("waitForCondition(%s) error (%s) ",
-                        T::name(), strerror(-err));
-                return err;
-            }
-        }
-    }
-    return (stack.identity != mIdentity) ? status_t(BAD_INDEX) : stack.status;
-}
-
-
-template <typename T>
-status_t SharedBufferBase::updateCondition(T update) {
-    SharedClient& client( *mSharedClient );
-    Mutex::Autolock _l(client.lock);
-    ssize_t result = update();
-    client.cv.broadcast();    
-    return result;
-}
-
-// ----------------------------------------------------------------------------
-
-class SharedBufferClient : public SharedBufferBase
-{
-public:
-    SharedBufferClient(SharedClient* sharedClient, int surface, int num,
-            int32_t identity);
-
-    ssize_t dequeue();
-    status_t undoDequeue(int buf);
-    
-    status_t lock(int buf);
-    status_t queue(int buf);
-    bool needNewBuffer(int buffer) const;
-    status_t setDirtyRegion(int buffer, const Region& reg);
-    
-private:
-    friend struct Condition;
-    friend struct DequeueCondition;
-    friend struct LockCondition;
-    
-    int32_t computeTail() const;
-
-    struct QueueUpdate : public UpdateBase {
-        inline QueueUpdate(SharedBufferBase* sbb);
-        inline ssize_t operator()();
-    };
-
-    struct UndoDequeueUpdate : public UpdateBase {
-        inline UndoDequeueUpdate(SharedBufferBase* sbb);
-        inline ssize_t operator()();
-    };
-
-    // --
-
-    struct DequeueCondition : public ConditionBase {
-        inline DequeueCondition(SharedBufferClient* sbc);
-        inline bool operator()();
-        static inline const char* name() { return "DequeueCondition"; }
-    };
-
-    struct LockCondition : public ConditionBase {
-        int buf;
-        inline LockCondition(SharedBufferClient* sbc, int buf);
-        inline bool operator()();
-        static inline const char* name() { return "LockCondition"; }
-    };
-
-    int32_t tail;
-    // statistics...
-    nsecs_t mDequeueTime[NUM_BUFFER_MAX];
-};
-
-// ----------------------------------------------------------------------------
-
-class SharedBufferServer : public SharedBufferBase
-{
-public:
-    SharedBufferServer(SharedClient* sharedClient, int surface, int num,
-            int32_t identity);
-
-    ssize_t retireAndLock();
-    status_t unlock(int buffer);
-    void setStatus(status_t status);
-    status_t reallocate();
-    status_t assertReallocate(int buffer);
-    int32_t getQueuedCount() const;
-    
-    Region getDirtyRegion(int buffer) const;
-
-    SharedBufferStack::Statistics getStats() const;
-    
-
-private:
-    struct UnlockUpdate : public UpdateBase {
-        const int lockedBuffer;
-        inline UnlockUpdate(SharedBufferBase* sbb, int lockedBuffer);
-        inline ssize_t operator()();
-    };
-
-    struct RetireUpdate : public UpdateBase {
-        const int numBuffers;
-        inline RetireUpdate(SharedBufferBase* sbb, int numBuffers);
-        inline ssize_t operator()();
-    };
-
-    struct StatusUpdate : public UpdateBase {
-        const status_t status;
-        inline StatusUpdate(SharedBufferBase* sbb, status_t status);
-        inline ssize_t operator()();
-    };
-
-    struct ReallocateCondition : public ConditionBase {
-        int buf;
-        inline ReallocateCondition(SharedBufferBase* sbb, int buf);
-        inline bool operator()();
-        static inline const char* name() { return "ReallocateCondition"; }
-    };
-};
-
-// ===========================================================================
-
-struct display_cblk_t
-{
-    uint16_t    w;
-    uint16_t    h;
-    uint8_t     format;
-    uint8_t     orientation;
-    uint8_t     reserved[2];
-    float       fps;
-    float       density;
-    float       xdpi;
-    float       ydpi;
-    uint32_t    pad[2];
-};
-
-struct surface_flinger_cblk_t   // 4KB max
-{
-    uint8_t         connected;
-    uint8_t         reserved[3];
-    uint32_t        pad[7];
-    display_cblk_t  displays[NUM_DISPLAY_MAX];
-};
-
-// ---------------------------------------------------------------------------
-
-COMPILE_TIME_ASSERT(sizeof(SharedClient) <= 4096)
-COMPILE_TIME_ASSERT(sizeof(SharedBufferStack) == 128)
-COMPILE_TIME_ASSERT(sizeof(surface_flinger_cblk_t) <= 4096)
-
-// ---------------------------------------------------------------------------
-}; // namespace android
-
-#endif /* ANDROID_UI_SHARED_BUFFER_STACK_H */