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Add warning when coroutine stack size grows too large.

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For the moment too large is 10.
This commit is contained in:
Ryan Dahl 2009-09-28 18:10:25 +02:00
parent 9f07a690c6
commit b7526eb324
1 changed files with 7 additions and 0 deletions
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7
src/events.cc
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@ -28,6 +28,7 @@ Persistent<FunctionTemplate> EventEmitter::constructor_template;
/* Poor Man's coroutines */
static Promise *coroutine_top;
static int coroutine_stack_size;
void EventEmitter::Initialize(Local<FunctionTemplate> ctemplate) {
HandleScope scope;
@ -41,6 +42,7 @@ void EventEmitter::Initialize(Local<FunctionTemplate> ctemplate) {
// All other prototype methods are defined in events.js
coroutine_top = NULL;
coroutine_stack_size = 0;
}
static bool ReallyEmit(Handle<Object> self,
@ -176,6 +178,10 @@ void Promise::Block(void) {
assert(prev_ == NULL);
if (coroutine_top) prev_ = coroutine_top;
coroutine_top = this;
coroutine_stack_size++;
if (coroutine_stack_size > 10) {
fprintf(stderr, "(node) WARNING: promise.wait() is being called too often.\n");
}
ev_loop(EV_DEFAULT_UC_ 0);
@ -187,6 +193,7 @@ void Promise::Destack() {
ev_unloop(EV_DEFAULT_ EVUNLOOP_ONE);
coroutine_top = prev_;
prev_ = NULL;
coroutine_stack_size--;
}
void Promise::Detach(void) {