本文整理汇总了C++中ConditionVariable::Add方法的典型用法代码示例。如果您正苦于以下问题：C++ ConditionVariable::Add方法的具体用法？C++ ConditionVariable::Add怎么用？C++ ConditionVariable::Add使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ConditionVariable的用法示例。
在下文中一共展示了ConditionVariable::Add方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
PhysicalPageSlot*
PhysicalPageSlotQueue::GetSlot()
{
InterruptsLocker locker;
// wait for a free slot to turn up
while (fSlots == NULL) {
ConditionVariableEntry entry;
fFreeSlotCondition.Add(&entry);
locker.Unlock();
entry.Wait();
locker.Lock();
}
PhysicalPageSlot* slot = fSlots;
fSlots = slot->next;
return slot;
}示例2: locker
static status_t
get_port_message(int32 code, size_t bufferSize, uint32 flags, bigtime_t timeout,
port_message** _message)
{
size_t size = sizeof(port_message) + bufferSize;
bool limitReached = false;
while (true) {
if (atomic_add(&sTotalSpaceInUse, size)
> int32(kTotalSpaceLimit - size)) {
// TODO: add per team limit
// We are not allowed to create another heap area, as our
// space limit has been reached - just wait until we get
// some free space again.
limitReached = true;
wait:
MutexLocker locker(sPortsLock);
atomic_add(&sTotalSpaceInUse, -size);
// TODO: we don't want to wait - but does that also mean we
// shouldn't wait for the area creation?
if (limitReached && (flags & B_RELATIVE_TIMEOUT) != 0
&& timeout <= 0)
return B_WOULD_BLOCK;
ConditionVariableEntry entry;
sNoSpaceCondition.Add(&entry);
locker.Unlock();
status_t status = entry.Wait(flags, timeout);
if (status == B_TIMED_OUT)
return B_TIMED_OUT;
// just try again
limitReached = false;
continue;
}
int32 areaChangeCounter = atomic_get(&sAreaChangeCounter);
// Quota is fulfilled, try to allocate the buffer
port_message* message
= (port_message*)heap_memalign(sPortAllocator, 0, size);
if (message != NULL) {
message->code = code;
message->size = bufferSize;
*_message = message;
return B_OK;
}
if (atomic_or(&sAllocatingArea, 1) != 0) {
// Just wait for someone else to create an area for us
goto wait;
}
if (areaChangeCounter != atomic_get(&sAreaChangeCounter)) {
atomic_add(&sTotalSpaceInUse, -size);
continue;
}
// Create a new area for the heap to use
addr_t base;
area_id area = create_area("port grown buffer", (void**)&base,
B_ANY_KERNEL_ADDRESS, kBufferGrowRate, B_NO_LOCK,
B_KERNEL_READ_AREA | B_KERNEL_WRITE_AREA);
if (area < 0) {
// it's time to let the userland feel our pain
sNoSpaceCondition.NotifyAll();
return B_NO_MEMORY;
}
heap_add_area(sPortAllocator, area, base, kBufferGrowRate);
atomic_add(&sAreaChangeCounter, 1);
sNoSpaceCondition.NotifyAll();
atomic_and(&sAllocatingArea, 0);
}
}