BpBinder.cpp

源码位置： frameworks/native/libs/binder/BpBinder.cpp
frameworks/native/include/binder/BpBinder.h

方法

• 构造函数

  138 BpBinder::BpBinder(int32_t handle, int32_t trackedUid)
  139     : mHandle(handle)
  140     , mAlive(1)
  141     , mObitsSent(0)
  142     , mObituaries(nullptr)
  143     , mTrackedUid(trackedUid)
  144 {
  145     ALOGV("Creating BpBinder %p handle %d\n", this, mHandle);
  146 
  147     extendObjectLifetime(OBJECT_LIFETIME_WEAK);
  148     IPCThreadState::self()->incWeakHandle(handle, this);
  149 }

• create

  109 BpBinder* BpBinder::create(int32_t handle) {
  110     int32_t trackedUid = -1;
  111     if (sCountByUidEnabled) {
  112         trackedUid = IPCThreadState::self()->getCallingUid();
  113         AutoMutex _l(sTrackingLock);
  114         uint32_t trackedValue = sTrackingMap[trackedUid];
  115         if (CC_UNLIKELY(trackedValue & LIMIT_REACHED_MASK)) {
  116             if (sBinderProxyThrottleCreate) {
  117                 return nullptr;
  118             }
  119         } else {
  120             if ((trackedValue & COUNTING_VALUE_MASK) >= sBinderProxyCountHighWatermark) {
  121                 ALOGE("Too many binder proxy objects sent to uid %d from uid %d (%d proxies held)",
  122                       getuid(), trackedUid, trackedValue);
  123                 sTrackingMap[trackedUid] |= LIMIT_REACHED_MASK;
  124                 if (sLimitCallback) sLimitCallback(trackedUid);
  125                 if (sBinderProxyThrottleCreate) {
  126                     ALOGI("Throttling binder proxy creates from uid %d in uid %d until binder proxy"
  127                           " count drops below %d",
  128                           trackedUid, getuid(), sBinderProxyCountLowWatermark);
  129                     return nullptr;
  130                 }
  131             }
  132         }
  133         sTrackingMap[trackedUid]++;
  134     }
  135     return new BpBinder(handle, trackedUid);
  136 }

  IPCThreadState类见http://xinyiworld.top/wordpress_it/?p=14487