Add m-esr52 at 52.6.0

1 files changed, 564 insertions, 0 deletions

diff --git a/media/omx-plugin/include/ics/utils/threads.h b/media/omx-plugin/include/ics/utils/threads.h
new file mode 100644
index 000000000..ab3e8cdb6
--- /dev/null
+++ b/media/omx-plugin/include/ics/utils/threads.h
@@ -0,0 +1,564 @@
+/*
+ * 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 _LIBS_UTILS_THREADS_H
+#define _LIBS_UTILS_THREADS_H
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <time.h>
+#include <system/graphics.h>
+
+#if defined(HAVE_PTHREADS)
+# include <pthread.h>
+#endif
+
+// ------------------------------------------------------------------
+// C API
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void* android_thread_id_t;
+
+typedef int (*android_thread_func_t)(void*);
+
+enum {
+    /*
+     * ***********************************************
+     * ** Keep in sync with android.os.Process.java **
+     * ***********************************************
+     * 
+     * This maps directly to the "nice" priorities we use in Android.
+     * A thread priority should be chosen inverse-proportionally to
+     * the amount of work the thread is expected to do. The more work
+     * a thread will do, the less favorable priority it should get so that 
+     * it doesn't starve the system. Threads not behaving properly might
+     * be "punished" by the kernel.
+     * Use the levels below when appropriate. Intermediate values are
+     * acceptable, preferably use the {MORE|LESS}_FAVORABLE constants below.
+     */
+    ANDROID_PRIORITY_LOWEST         =  19,
+
+    /* use for background tasks */
+    ANDROID_PRIORITY_BACKGROUND     =  10,
+    
+    /* most threads run at normal priority */
+    ANDROID_PRIORITY_NORMAL         =   0,
+    
+    /* threads currently running a UI that the user is interacting with */
+    ANDROID_PRIORITY_FOREGROUND     =  -2,
+
+    /* the main UI thread has a slightly more favorable priority */
+    ANDROID_PRIORITY_DISPLAY        =  -4,
+    
+    /* ui service treads might want to run at a urgent display (uncommon) */
+    ANDROID_PRIORITY_URGENT_DISPLAY =  HAL_PRIORITY_URGENT_DISPLAY,
+    
+    /* all normal audio threads */
+    ANDROID_PRIORITY_AUDIO          = -16,
+    
+    /* service audio threads (uncommon) */
+    ANDROID_PRIORITY_URGENT_AUDIO   = -19,
+
+    /* should never be used in practice. regular process might not 
+     * be allowed to use this level */
+    ANDROID_PRIORITY_HIGHEST        = -20,
+
+    ANDROID_PRIORITY_DEFAULT        = ANDROID_PRIORITY_NORMAL,
+    ANDROID_PRIORITY_MORE_FAVORABLE = -1,
+    ANDROID_PRIORITY_LESS_FAVORABLE = +1,
+};
+
+enum {
+    ANDROID_TGROUP_DEFAULT          = 0,
+    ANDROID_TGROUP_BG_NONINTERACT   = 1,
+    ANDROID_TGROUP_FG_BOOST         = 2,
+    ANDROID_TGROUP_MAX              = ANDROID_TGROUP_FG_BOOST,
+};
+
+// Create and run a new thread.
+extern int androidCreateThread(android_thread_func_t, void *);
+
+// Create thread with lots of parameters
+extern int androidCreateThreadEtc(android_thread_func_t entryFunction,
+                                  void *userData,
+                                  const char* threadName,
+                                  int32_t threadPriority,
+                                  size_t threadStackSize,
+                                  android_thread_id_t *threadId);
+
+// Get some sort of unique identifier for the current thread.
+extern android_thread_id_t androidGetThreadId();
+
+// Low-level thread creation -- never creates threads that can
+// interact with the Java VM.
+extern int androidCreateRawThreadEtc(android_thread_func_t entryFunction,
+                                     void *userData,
+                                     const char* threadName,
+                                     int32_t threadPriority,
+                                     size_t threadStackSize,
+                                     android_thread_id_t *threadId);
+
+// Used by the Java Runtime to control how threads are created, so that
+// they can be proper and lovely Java threads.
+typedef int (*android_create_thread_fn)(android_thread_func_t entryFunction,
+                                        void *userData,
+                                        const char* threadName,
+                                        int32_t threadPriority,
+                                        size_t threadStackSize,
+                                        android_thread_id_t *threadId);
+
+extern void androidSetCreateThreadFunc(android_create_thread_fn func);
+
+// ------------------------------------------------------------------
+// Extra functions working with raw pids.
+
+// Get pid for the current thread.
+extern pid_t androidGetTid();
+
+// Change the scheduling group of a particular thread.  The group
+// should be one of the ANDROID_TGROUP constants.  Returns BAD_VALUE if
+// grp is out of range, else another non-zero value with errno set if
+// the operation failed.  Thread ID zero means current thread.
+extern int androidSetThreadSchedulingGroup(pid_t tid, int grp);
+
+// Change the priority AND scheduling group of a particular thread.  The priority
+// should be one of the ANDROID_PRIORITY constants.  Returns INVALID_OPERATION
+// if the priority set failed, else another value if just the group set failed;
+// in either case errno is set.  Thread ID zero means current thread.
+extern int androidSetThreadPriority(pid_t tid, int prio);
+
+// Get the current priority of a particular thread. Returns one of the
+// ANDROID_PRIORITY constants or a negative result in case of error.
+extern int androidGetThreadPriority(pid_t tid);
+
+// Get the current scheduling group of a particular thread. Normally returns
+// one of the ANDROID_TGROUP constants other than ANDROID_TGROUP_DEFAULT.
+// Returns ANDROID_TGROUP_DEFAULT if no pthread support (e.g. on host) or if
+// scheduling groups are disabled.  Returns INVALID_OPERATION if unexpected error.
+// Thread ID zero means current thread.
+extern int androidGetThreadSchedulingGroup(pid_t tid);
+
+#ifdef __cplusplus
+}
+#endif
+
+// ------------------------------------------------------------------
+// C++ API
+
+#ifdef __cplusplus
+
+#include <utils/Errors.h>
+#include <utils/RefBase.h>
+#include <utils/Timers.h>
+
+namespace android {
+
+typedef android_thread_id_t thread_id_t;
+
+typedef android_thread_func_t thread_func_t;
+
+enum {
+    PRIORITY_LOWEST         = ANDROID_PRIORITY_LOWEST,
+    PRIORITY_BACKGROUND     = ANDROID_PRIORITY_BACKGROUND,
+    PRIORITY_NORMAL         = ANDROID_PRIORITY_NORMAL,
+    PRIORITY_FOREGROUND     = ANDROID_PRIORITY_FOREGROUND,
+    PRIORITY_DISPLAY        = ANDROID_PRIORITY_DISPLAY,
+    PRIORITY_URGENT_DISPLAY = ANDROID_PRIORITY_URGENT_DISPLAY,
+    PRIORITY_AUDIO          = ANDROID_PRIORITY_AUDIO,
+    PRIORITY_URGENT_AUDIO   = ANDROID_PRIORITY_URGENT_AUDIO,
+    PRIORITY_HIGHEST        = ANDROID_PRIORITY_HIGHEST,
+    PRIORITY_DEFAULT        = ANDROID_PRIORITY_DEFAULT,
+    PRIORITY_MORE_FAVORABLE = ANDROID_PRIORITY_MORE_FAVORABLE,
+    PRIORITY_LESS_FAVORABLE = ANDROID_PRIORITY_LESS_FAVORABLE,
+};
+
+// Create and run a new thread.
+inline bool createThread(thread_func_t f, void *a) {
+    return androidCreateThread(f, a) ? true : false;
+}
+
+// Create thread with lots of parameters
+inline bool createThreadEtc(thread_func_t entryFunction,
+                            void *userData,
+                            const char* threadName = "android:unnamed_thread",
+                            int32_t threadPriority = PRIORITY_DEFAULT,
+                            size_t threadStackSize = 0,
+                            thread_id_t *threadId = 0)
+{
+    return androidCreateThreadEtc(entryFunction, userData, threadName,
+        threadPriority, threadStackSize, threadId) ? true : false;
+}
+
+// Get some sort of unique identifier for the current thread.
+inline thread_id_t getThreadId() {
+    return androidGetThreadId();
+}
+
+/*****************************************************************************/
+
+/*
+ * Simple mutex class.  The implementation is system-dependent.
+ *
+ * The mutex must be unlocked by the thread that locked it.  They are not
+ * recursive, i.e. the same thread can't lock it multiple times.
+ */
+class Mutex {
+public:
+    enum {
+        PRIVATE = 0,
+        SHARED = 1
+    };
+    
+                Mutex();
+                Mutex(const char* name);
+                Mutex(int type, const char* name = NULL);
+                ~Mutex();
+
+    // lock or unlock the mutex
+    status_t    lock();
+    void        unlock();
+
+    // lock if possible; returns 0 on success, error otherwise
+    status_t    tryLock();
+
+    // Manages the mutex automatically. It'll be locked when Autolock is
+    // constructed and released when Autolock goes out of scope.
+    class Autolock {
+    public:
+        inline Autolock(Mutex& mutex) : mLock(mutex)  { mLock.lock(); }
+        inline Autolock(Mutex* mutex) : mLock(*mutex) { mLock.lock(); }
+        inline ~Autolock() { mLock.unlock(); }
+    private:
+        Mutex& mLock;
+    };
+
+private:
+    friend class Condition;
+    
+    // A mutex cannot be copied
+                Mutex(const Mutex&);
+    Mutex&      operator = (const Mutex&);
+    
+#if defined(HAVE_PTHREADS)
+    pthread_mutex_t mMutex;
+#else
+    void    _init();
+    void*   mState;
+#endif
+};
+
+#if defined(HAVE_PTHREADS)
+
+inline Mutex::Mutex() {
+    pthread_mutex_init(&mMutex, NULL);
+}
+inline Mutex::Mutex(const char* name) {
+    pthread_mutex_init(&mMutex, NULL);
+}
+inline Mutex::Mutex(int type, const char* name) {
+    if (type == SHARED) {
+        pthread_mutexattr_t attr;
+        pthread_mutexattr_init(&attr);
+        pthread_mutexattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+        pthread_mutex_init(&mMutex, &attr);
+        pthread_mutexattr_destroy(&attr);
+    } else {
+        pthread_mutex_init(&mMutex, NULL);
+    }
+}
+inline Mutex::~Mutex() {
+    pthread_mutex_destroy(&mMutex);
+}
+inline status_t Mutex::lock() {
+    return -pthread_mutex_lock(&mMutex);
+}
+inline void Mutex::unlock() {
+    pthread_mutex_unlock(&mMutex);
+}
+inline status_t Mutex::tryLock() {
+    return -pthread_mutex_trylock(&mMutex);
+}
+
+#endif // HAVE_PTHREADS
+
+/*
+ * Automatic mutex.  Declare one of these at the top of a function.
+ * When the function returns, it will go out of scope, and release the
+ * mutex.
+ */
+ 
+typedef Mutex::Autolock AutoMutex;
+
+/*****************************************************************************/
+
+#if defined(HAVE_PTHREADS)
+
+/*
+ * Simple mutex class.  The implementation is system-dependent.
+ *
+ * The mutex must be unlocked by the thread that locked it.  They are not
+ * recursive, i.e. the same thread can't lock it multiple times.
+ */
+class RWLock {
+public:
+    enum {
+        PRIVATE = 0,
+        SHARED = 1
+    };
+
+                RWLock();
+                RWLock(const char* name);
+                RWLock(int type, const char* name = NULL);
+                ~RWLock();
+
+    status_t    readLock();
+    status_t    tryReadLock();
+    status_t    writeLock();
+    status_t    tryWriteLock();
+    void        unlock();
+
+    class AutoRLock {
+    public:
+        inline AutoRLock(RWLock& rwlock) : mLock(rwlock)  { mLock.readLock(); }
+        inline ~AutoRLock() { mLock.unlock(); }
+    private:
+        RWLock& mLock;
+    };
+
+    class AutoWLock {
+    public:
+        inline AutoWLock(RWLock& rwlock) : mLock(rwlock)  { mLock.writeLock(); }
+        inline ~AutoWLock() { mLock.unlock(); }
+    private:
+        RWLock& mLock;
+    };
+
+private:
+    // A RWLock cannot be copied
+                RWLock(const RWLock&);
+   RWLock&      operator = (const RWLock&);
+
+   pthread_rwlock_t mRWLock;
+};
+
+inline RWLock::RWLock() {
+    pthread_rwlock_init(&mRWLock, NULL);
+}
+inline RWLock::RWLock(const char* name) {
+    pthread_rwlock_init(&mRWLock, NULL);
+}
+inline RWLock::RWLock(int type, const char* name) {
+    if (type == SHARED) {
+        pthread_rwlockattr_t attr;
+        pthread_rwlockattr_init(&attr);
+        pthread_rwlockattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+        pthread_rwlock_init(&mRWLock, &attr);
+        pthread_rwlockattr_destroy(&attr);
+    } else {
+        pthread_rwlock_init(&mRWLock, NULL);
+    }
+}
+inline RWLock::~RWLock() {
+    pthread_rwlock_destroy(&mRWLock);
+}
+inline status_t RWLock::readLock() {
+    return -pthread_rwlock_rdlock(&mRWLock);
+}
+inline status_t RWLock::tryReadLock() {
+    return -pthread_rwlock_tryrdlock(&mRWLock);
+}
+inline status_t RWLock::writeLock() {
+    return -pthread_rwlock_wrlock(&mRWLock);
+}
+inline status_t RWLock::tryWriteLock() {
+    return -pthread_rwlock_trywrlock(&mRWLock);
+}
+inline void RWLock::unlock() {
+    pthread_rwlock_unlock(&mRWLock);
+}
+
+#endif // HAVE_PTHREADS
+
+/*****************************************************************************/
+
+/*
+ * Condition variable class.  The implementation is system-dependent.
+ *
+ * Condition variables are paired up with mutexes.  Lock the mutex,
+ * call wait(), then either re-wait() if things aren't quite what you want,
+ * or unlock the mutex and continue.  All threads calling wait() must
+ * use the same mutex for a given Condition.
+ */
+class Condition {
+public:
+    enum {
+        PRIVATE = 0,
+        SHARED = 1
+    };
+
+    Condition();
+    Condition(int type);
+    ~Condition();
+    // Wait on the condition variable.  Lock the mutex before calling.
+    status_t wait(Mutex& mutex);
+    // same with relative timeout
+    status_t waitRelative(Mutex& mutex, nsecs_t reltime);
+    // Signal the condition variable, allowing one thread to continue.
+    void signal();
+    // Signal the condition variable, allowing all threads to continue.
+    void broadcast();
+
+private:
+#if defined(HAVE_PTHREADS)
+    pthread_cond_t mCond;
+#else
+    void*   mState;
+#endif
+};
+
+#if defined(HAVE_PTHREADS)
+
+inline Condition::Condition() {
+    pthread_cond_init(&mCond, NULL);
+}
+inline Condition::Condition(int type) {
+    if (type == SHARED) {
+        pthread_condattr_t attr;
+        pthread_condattr_init(&attr);
+        pthread_condattr_setpshared(&attr, PTHREAD_PROCESS_SHARED);
+        pthread_cond_init(&mCond, &attr);
+        pthread_condattr_destroy(&attr);
+    } else {
+        pthread_cond_init(&mCond, NULL);
+    }
+}
+inline Condition::~Condition() {
+    pthread_cond_destroy(&mCond);
+}
+inline status_t Condition::wait(Mutex& mutex) {
+    return -pthread_cond_wait(&mCond, &mutex.mMutex);
+}
+inline status_t Condition::waitRelative(Mutex& mutex, nsecs_t reltime) {
+#if defined(HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE)
+    struct timespec ts;
+    ts.tv_sec  = reltime/1000000000;
+    ts.tv_nsec = reltime%1000000000;
+    return -pthread_cond_timedwait_relative_np(&mCond, &mutex.mMutex, &ts);
+#else // HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE
+    struct timespec ts;
+#if defined(HAVE_POSIX_CLOCKS)
+    clock_gettime(CLOCK_REALTIME, &ts);
+#else // HAVE_POSIX_CLOCKS
+    // we don't support the clocks here.
+    struct timeval t;
+    gettimeofday(&t, NULL);
+    ts.tv_sec = t.tv_sec;
+    ts.tv_nsec= t.tv_usec*1000;
+#endif // HAVE_POSIX_CLOCKS
+    ts.tv_sec += reltime/1000000000;
+    ts.tv_nsec+= reltime%1000000000;
+    if (ts.tv_nsec >= 1000000000) {
+        ts.tv_nsec -= 1000000000;
+        ts.tv_sec  += 1;
+    }
+    return -pthread_cond_timedwait(&mCond, &mutex.mMutex, &ts);
+#endif // HAVE_PTHREAD_COND_TIMEDWAIT_RELATIVE
+}
+inline void Condition::signal() {
+    pthread_cond_signal(&mCond);
+}
+inline void Condition::broadcast() {
+    pthread_cond_broadcast(&mCond);
+}
+
+#endif // HAVE_PTHREADS
+
+/*****************************************************************************/
+
+/*
+ * This is our spiffy thread object!
+ */
+
+class Thread : virtual public RefBase
+{
+public:
+    // Create a Thread object, but doesn't create or start the associated
+    // thread. See the run() method.
+                        Thread(bool canCallJava = true);
+    virtual             ~Thread();
+
+    // Start the thread in threadLoop() which needs to be implemented.
+    virtual status_t    run(    const char* name = 0,
+                                int32_t priority = PRIORITY_DEFAULT,
+                                size_t stack = 0);
+    
+    // Ask this object's thread to exit. This function is asynchronous, when the
+    // function returns the thread might still be running. Of course, this
+    // function can be called from a different thread.
+    virtual void        requestExit();
+
+    // Good place to do one-time initializations
+    virtual status_t    readyToRun();
+    
+    // Call requestExit() and wait until this object's thread exits.
+    // BE VERY CAREFUL of deadlocks. In particular, it would be silly to call
+    // this function from this object's thread. Will return WOULD_BLOCK in
+    // that case.
+            status_t    requestExitAndWait();
+
+    // Wait until this object's thread exits. Returns immediately if not yet running.
+    // Do not call from this object's thread; will return WOULD_BLOCK in that case.
+            status_t    join();
+
+protected:
+    // exitPending() returns true if requestExit() has been called.
+            bool        exitPending() const;
+    
+private:
+    // Derived class must implement threadLoop(). The thread starts its life
+    // here. There are two ways of using the Thread object:
+    // 1) loop: if threadLoop() returns true, it will be called again if
+    //          requestExit() wasn't called.
+    // 2) once: if threadLoop() returns false, the thread will exit upon return.
+    virtual bool        threadLoop() = 0;
+
+private:
+    Thread& operator=(const Thread&);
+    static  int             _threadLoop(void* user);
+    const   bool            mCanCallJava;
+    // always hold mLock when reading or writing
+            thread_id_t     mThread;
+    mutable Mutex           mLock;
+            Condition       mThreadExitedCondition;
+            status_t        mStatus;
+    // note that all accesses of mExitPending and mRunning need to hold mLock
+    volatile bool           mExitPending;
+    volatile bool           mRunning;
+            sp<Thread>      mHoldSelf;
+#if HAVE_ANDROID_OS
+            int             mTid;
+#endif
+};
+
+
+}; // namespace android
+
+#endif  // __cplusplus
+
+#endif // _LIBS_UTILS_THREADS_H