windows核心编程 如何等待超过64（MAXIMUM_WAIT_OBJECTS） kernal object

Windows API WaitForMultiObjects(...) 最多只能等待MAXIMUM_WAIT_OBJECTS个kernal objects。MAXIMUM_WAIT_OBJECTS被定义为64。那么这就限制了一次最多只能等待64个内核对象。根据网上查阅的资料，这里给出一种解决方案，允许等待任意多的内核对象(系统支持的范围内)。

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#include <Windows.h>

/*

* Synchronically waiting for all objects signaled.

* - handles : An array of object handles to wait.

* - count : The count of handles.

* returns : Same as WaitForMultipleObjects.

*/

DWORD SyncWaitForMultipleObjs(HANDLE * handles, size_t count)

{

int waitingThreadsCount = count;

int index = 0;

DWORD res = 0;

while(waitingThreadsCount >= MAXIMUM_WAIT_OBJECTS)

{

res = WaitForMultipleObjects(MAXIMUM_WAIT_OBJECTS, &handles[index], TRUE, INFINITE);

if(res == WAIT_TIMEOUT || res == WAIT_FAILED)

{

puts("1. Wait Failed.");

return res;

}

waitingThreadsCount -= MAXIMUM_WAIT_OBJECTS;

index += MAXIMUM_WAIT_OBJECTS;

}

if(waitingThreadsCount > 0)

{

res = WaitForMultipleObjects(waitingThreadsCount, &handles[index], TRUE, INFINITE);

if(res == WAIT_TIMEOUT || res == WAIT_FAILED)

{

puts("2. Wait Failed.");

}

}

return res;

}