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  • android Thread class

    system/core/libutils/include/utils/Thread.h
    system/core/libutils/Threads.cpp

    status_t Thread::run(const char* name, int32_t priority, size_t stack)
    665{
    666    LOG_ALWAYS_FATAL_IF(name == nullptr, "thread name not provided to Thread::run");
    667
    668    Mutex::Autolock _l(mLock);
    669
    670    if (mRunning) {
    671        // thread already started
    672        return INVALID_OPERATION;
    673    }
    674
    675    // reset status and exitPending to their default value, so we can
    676    // try again after an error happened (either below, or in readyToRun())
    677    mStatus = OK;
    678    mExitPending = false;
    679    mThread = thread_id_t(-1);
    680
    681    // hold a strong reference on ourself
    682    mHoldSelf = this;
    683
    684    mRunning = true;
    685
    686    bool res;
    687    if (mCanCallJava) {
    688        res = createThreadEtc(_threadLoop,
    689                this, name, priority, stack, &mThread);
    690    } else {
    691        res = androidCreateRawThreadEtc(_threadLoop,
    692                this, name, priority, stack, &mThread);
    693    }
    694
    695    if (res == false) {
    696        mStatus = UNKNOWN_ERROR;   // something happened!
    697        mRunning = false;
    698        mThread = thread_id_t(-1);
    699        mHoldSelf.clear();  // "this" may have gone away after this.
    700
    701        return UNKNOWN_ERROR;
    702    }
    703
    704    // Do not refer to mStatus here: The thread is already running (may, in fact
    705    // already have exited with a valid mStatus result). The OK indication
    706    // here merely indicates successfully starting the thread and does not
    707    // imply successful termination/execution.
    708    return OK;
    709
    710    // Exiting scope of mLock is a memory barrier and allows new thread to run
    711}
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  • 原文地址:https://www.cnblogs.com/aspirs/p/11941645.html
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