85 lines
1.7 KiB
C++
85 lines
1.7 KiB
C++
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#include "ThreadLoop.h"
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lifo_t ThreadLoop::procedure_cache = {0,};
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lifo_t ThreadLoop::cache_bases= {0,};
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#define PROCEDURE_CACHE_SEED 64
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ThreadLoop::ThreadLoop()
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{
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mpscq_init(&procedure_queue);
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procedure_notification = CreateSemaphore(0, 0, LONG_MAX, 0);
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kill_switch = CreateEvent(0, TRUE, FALSE, 0);
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}
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void ThreadLoop::RefillCache()
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{
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threadloop_node_t *cache_seed = (threadloop_node_t *)malloc(PROCEDURE_CACHE_SEED*sizeof(threadloop_node_t));
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if (cache_seed)
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{
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int i=PROCEDURE_CACHE_SEED;
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while (--i)
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{
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lifo_push(&procedure_cache, (queue_node_t *)&cache_seed[i]);
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}
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lifo_push(&cache_bases, (queue_node_t *)cache_seed);
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}
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else
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{
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Sleep(0); // yield and hope that someone else pops something off soon
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}
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}
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void ThreadLoop::Run()
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{
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HANDLE events[] = {kill_switch, procedure_notification};
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while (WaitForMultipleObjects(2, events, FALSE, INFINITE) == WAIT_OBJECT_0 + 1)
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{
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for (;;)
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{
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threadloop_node_t *apc = (threadloop_node_t *)mpscq_pop(&procedure_queue);
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if (apc == (threadloop_node_t *)1) /* special return value that indicates a busy list */
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{
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Sleep(0); // yield so that the thread that got pre-empted during push can finish
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}
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else
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{
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if (apc)
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{
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apc->func(apc->param1, apc->param2, apc->real_value);
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lifo_push(&procedure_cache, apc);
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}
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else
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{
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break;
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}
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}
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}
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}
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}
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threadloop_node_t *ThreadLoop::GetAPC()
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{
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threadloop_node_t *apc = 0;
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do
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{
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apc = (threadloop_node_t *)lifo_pop(&procedure_cache);
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if (!apc)
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RefillCache();
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} while (!apc);
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return apc;
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}
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void ThreadLoop::Schedule(threadloop_node_t *apc)
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{
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if (mpscq_push(&procedure_queue, apc) == 0)
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ReleaseSemaphore(procedure_notification, 1, 0);
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}
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void ThreadLoop::Kill()
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{
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SetEvent(kill_switch);
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}
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