82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
#include "iowatcher.h"
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#ifdef EVENT_IOCP
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#include "hplatform.h"
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#include "hdef.h"
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#include "hevent.h"
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#include "overlapio.h"
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typedef struct iocp_ctx_s {
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HANDLE iocp;
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} iocp_ctx_t;
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int iowatcher_init(hloop_t* loop) {
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if (loop->iowatcher) return 0;
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iocp_ctx_t* iocp_ctx;
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HV_ALLOC_SIZEOF(iocp_ctx);
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iocp_ctx->iocp = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, 0, 0);
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loop->iowatcher = iocp_ctx;
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return 0;
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}
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int iowatcher_cleanup(hloop_t* loop) {
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if (loop->iowatcher == NULL) return 0;
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iocp_ctx_t* iocp_ctx = (iocp_ctx_t*)loop->iowatcher;
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CloseHandle(iocp_ctx->iocp);
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HV_FREE(loop->iowatcher);
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return 0;
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}
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int iowatcher_add_event(hloop_t* loop, int fd, int events) {
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if (loop->iowatcher == NULL) {
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iowatcher_init(loop);
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}
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iocp_ctx_t* iocp_ctx = (iocp_ctx_t*)loop->iowatcher;
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hio_t* io = loop->ios.ptr[fd];
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if (io && io->events == 0 && events != 0) {
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CreateIoCompletionPort((HANDLE)fd, iocp_ctx->iocp, 0, 0);
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}
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return 0;
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}
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int iowatcher_del_event(hloop_t* loop, int fd, int events) {
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hio_t* io = loop->ios.ptr[fd];
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if ((io->events & ~events) == 0) {
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CancelIo((HANDLE)fd);
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}
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return 0;
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}
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int iowatcher_poll_events(hloop_t* loop, int timeout) {
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if (loop->iowatcher == NULL) return 0;
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iocp_ctx_t* iocp_ctx = (iocp_ctx_t*)loop->iowatcher;
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DWORD bytes = 0;
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ULONG_PTR key = 0;
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LPOVERLAPPED povlp = NULL;
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BOOL bRet = GetQueuedCompletionStatus(iocp_ctx->iocp, &bytes, &key, &povlp, timeout);
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int err = 0;
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if (povlp == NULL) {
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err = WSAGetLastError();
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if (err == WAIT_TIMEOUT || ERROR_NETNAME_DELETED || ERROR_OPERATION_ABORTED) {
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return 0;
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}
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return -err;
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}
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hoverlapped_t* hovlp = (hoverlapped_t*)povlp;
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hio_t* io = hovlp->io;
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if (bRet == FALSE) {
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err = WSAGetLastError();
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printd("iocp ret=%d err=%d bytes=%u\n", bRet, err, bytes);
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// NOTE: when ConnectEx failed, err != 0
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hovlp->error = err;
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}
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// NOTE: when WSASend/WSARecv disconnect, bytes = 0
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hovlp->bytes = bytes;
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io->hovlp = hovlp;
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io->revents |= hovlp->event;
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EVENT_PENDING(hovlp->io);
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return 1;
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}
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#endif
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