C++ (Cpp) pushReusableContext示例

示例#1

文件： Dispatcher.cpp 项目： RAY-official/catalyst

void Dispatcher::contextProcedure(void* ucontext) {
  assert(firstReusableContext == nullptr);
  NativeContext context;
  context.ucontext = ucontext;
  context.interrupted = false;
  context.next = nullptr;
  firstReusableContext = &context;
  ucontext_t* oldContext = static_cast<ucontext_t*>(context.ucontext);
  if (swapcontext(oldContext, static_cast<ucontext_t*>(currentContext->ucontext)) == -1) {
    throw std::runtime_error("Dispatcher::contextProcedure, swapcontext failed, " + lastErrorMessage());
  }

  for (;;) {
    ++runningContextCount;
    try {
      context.procedure();
    } catch(std::exception&) {
    }

    if (context.group != nullptr) {
      if (context.groupPrev != nullptr) {
        assert(context.groupPrev->groupNext == &context);
        context.groupPrev->groupNext = context.groupNext;
        if (context.groupNext != nullptr) {
          assert(context.groupNext->groupPrev == &context);
          context.groupNext->groupPrev = context.groupPrev;
        } else {
          assert(context.group->lastContext == &context);
          context.group->lastContext = context.groupPrev;
        }
      } else {
        assert(context.group->firstContext == &context);
        context.group->firstContext = context.groupNext;
        if (context.groupNext != nullptr) {
          assert(context.groupNext->groupPrev == &context);
          context.groupNext->groupPrev = nullptr;
        } else {
          assert(context.group->lastContext == &context);
          if (context.group->firstWaiter != nullptr) {
            if (firstResumingContext != nullptr) {
              assert(lastResumingContext->next == nullptr);
              lastResumingContext->next = context.group->firstWaiter;
            } else {
              firstResumingContext = context.group->firstWaiter;
            }

            lastResumingContext = context.group->lastWaiter;
            context.group->firstWaiter = nullptr;
          }
        }
      }

      pushReusableContext(context);
    }

    dispatch();
  }
};

示例#2

文件： Dispatcher.cpp 项目： dinastyoffreedom/dinastycoin

void Dispatcher::contextProcedure() {
  assert(GetCurrentThreadId() == threadId);
  assert(firstReusableContext == nullptr);
  NativeContext context;
  context.interrupted = false;
  context.next = nullptr;
  context.inExecutionQueue = false;
  firstReusableContext = &context;
  SwitchToFiber(currentContext->fiber);
  for (;;) {
    ++runningContextCount;
    try {
      context.procedure();
    } catch (...) {
    }

    if (context.group != nullptr) {
      if (context.groupPrev != nullptr) {
        assert(context.groupPrev->groupNext == &context);
        context.groupPrev->groupNext = context.groupNext;
        if (context.groupNext != nullptr) {
          assert(context.groupNext->groupPrev == &context);
          context.groupNext->groupPrev = context.groupPrev;
        } else {
          assert(context.group->lastContext == &context);
          context.group->lastContext = context.groupPrev;
        }
      } else {
        assert(context.group->firstContext == &context);
        context.group->firstContext = context.groupNext;
        if (context.groupNext != nullptr) {
          assert(context.groupNext->groupPrev == &context);
          context.groupNext->groupPrev = nullptr;
        } else {
          assert(context.group->lastContext == &context);
          if (context.group->firstWaiter != nullptr) {
            if (firstResumingContext != nullptr) {
              assert(lastResumingContext->next == nullptr);
              lastResumingContext->next = context.group->firstWaiter;
            } else {
              firstResumingContext = context.group->firstWaiter;
            }

            lastResumingContext = context.group->lastWaiter;
            context.group->firstWaiter = nullptr;
          }
        }
      }

      pushReusableContext(context);
    }

    dispatch();
  }
}