60 lines
1.6 KiB
C
60 lines
1.6 KiB
C
/*
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* $QNXLicenseC:
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* Copyright 2007, QNX Software Systems. All Rights Reserved.
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*
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* You must obtain a written license from and pay applicable license fees to QNX
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* Software Systems before you may reproduce, modify or distribute this software,
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* or any work that includes all or part of this software. Free development
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* licenses are available for evaluation and non-commercial purposes. For more
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* information visit http://licensing.qnx.com or email licensing@qnx.com.
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*
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* This file may contain contributions from others. Please review this entire
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* file for other proprietary rights or license notices, as well as the QNX
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* Development Suite License Guide at http://licensing.qnx.com/license-guide/
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* for other information.
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* $
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*/
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#include "externs.h"
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int
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io_unblock(resmgr_context_t *ctp, io_pulse_t *msg, struct ocb *ocb) {
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MQDEV *dev = ocb->ocb.attr;
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MQWAIT *wp, *wp_prev;
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struct _msg_info info;
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// Check if rcvid is still valid and still has an unblock request pending.
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if(MsgInfo(ctp->rcvid, &info) == -1 || !(info.flags & _NTO_MI_UNBLOCK_REQ)) {
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return _RESMGR_NOREPLY;
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}
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// Remove from blocked readers.
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wp_prev = (MQWAIT *) &dev->waiting_read;
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for(; wp = wp_prev->next ; wp_prev = wp) {
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if(wp->rcvid == ctp->rcvid) {
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wp_prev->next = wp->next;
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MemchunkFree(memchunk, wp);
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return EINTR;
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}
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}
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// Remove from blocked writers.
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wp_prev = (MQWAIT *) &dev->waiting_write;
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for(; wp = wp_prev->next ; wp_prev = wp) {
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if(wp->rcvid == ctp->rcvid) {
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wp_prev->next = wp->next;
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MemchunkFree(memchunk, wp);
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return EINTR;
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}
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}
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return _RESMGR_NOREPLY;
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}
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__SRCVERSION("io_unblock.c $Rev: 153052 $");
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