| Class | ConditionVariable |
| In: |
ext/fastthread/fastthread.c
ext/fastthread/fastthread.c |
| Parent: | Object |
ConditionVariable objects augment class Mutex. Using condition variables, it is possible to suspend while in the middle of a critical section until a resource becomes available.
Example:
require 'thread'
mutex = Mutex.new
resource = ConditionVariable.new
a = Thread.new {
mutex.synchronize {
# Thread 'a' now needs the resource
resource.wait(mutex)
# 'a' can now have the resource
}
}
b = Thread.new {
mutex.synchronize {
# Thread 'b' has finished using the resource
resource.signal
}
}
Wakes up all threads waiting for this condition.
/*
* Document-method: broadcast
* call-seq: broadcast
*
* Wakes up all threads waiting for this condition.
*
*/
static VALUE
rb_condvar_broadcast(VALUE self)
{
ConditionVariable *condvar;
Data_Get_Struct(self, ConditionVariable, condvar);
thread_exclusive(wake_all, (VALUE)&condvar->waiting);
rb_thread_schedule();
return self;
}
Wakes up all threads waiting for this condition.
/*
* Document-method: broadcast
* call-seq: broadcast
*
* Wakes up all threads waiting for this condition.
*
*/
static VALUE
rb_condvar_broadcast(VALUE self)
{
ConditionVariable *condvar;
Data_Get_Struct(self, ConditionVariable, condvar);
thread_exclusive(wake_all, (VALUE)&condvar->waiting);
rb_thread_schedule();
return self;
}
for marshalling mutexes and condvars
/* for marshalling mutexes and condvars */
static VALUE
dummy_load(VALUE self, VALUE string)
{
return Qnil;
}