633 lines
14 KiB
C
633 lines
14 KiB
C
/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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send.c
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Abstract:
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Send packets
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Author:
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Ahmed Mohamed (ahmedm) 12, 01, 2000
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Revision History:
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--*/
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#include "gs.h"
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#include "gsp.h"
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#include <stdio.h>
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void
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GspOpenContext(gs_group_t *gd, gs_context_t **context)
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{
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gs_context_t *ctx;
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int i;
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gs_log(("wait on free ctx gid %d\n", gd->g_id));
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GsSemaAcquire(gd->g_send.s_sema);
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//xxx: this can be done using atomic instruction
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GsLockEnter(gd->g_lock);
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for (i = 0; i < gd->g_send.s_wsz; i++) {
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ctx = &gd->g_send.s_ctxpool[i];
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if (ctx->ctx_id == GS_CONTEXT_INVALID_ID) {
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break;
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}
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}
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assert(i != gd->g_send.s_wsz);
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ctx->ctx_id = (gs_cookie_t) i;
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ctx->ctx_bnum = 0;
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GsLockExit(gd->g_lock);
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gs_log(("got free ctx %d gid %d\n", i, gd->g_id));
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*context = ctx;
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}
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void
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GspCloseContext(gs_group_t *gd, gs_context_t *ctx)
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{
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gs_msg_t *msg;
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assert(gd->g_id == ctx->ctx_gid);
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gs_log(("release ctx %d gid %d\n", ctx->ctx_id, gd->g_id));
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// free/invalidate context
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ctx->ctx_id = GS_CONTEXT_INVALID_ID;
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GsSemaRelease(gd->g_send.s_sema);
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}
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void CALLBACK timercallback(UINT id, UINT xxmsg, DWORD_PTR data, DWORD dw1, DWORD dw2)
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{
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gs_context_t *ctx = (gs_context_t *) data;
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gs_group_t *gd;
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gs_msg_t *msg;
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msg = ctx->ctx_msg;
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if (msg == NULL) {
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return;
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}
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gd = GspLookupGroup(ctx->ctx_gid);
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assert(gd != NULL);
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// resend msg
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GsLockEnter(gd->g_lock);
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msg = ctx->ctx_msg;
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if (msg != NULL) {
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ULONG mask = ctx->ctx_mask;
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gs_memberid_t id;
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// send a reliable point-to-point to non-response nodes
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gs_log(("Timercallback mset %x\n", mask));
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msg->m_hdr.h_flags |= GS_FLAGS_REPLAY;
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for (id = 1; mask; id++, mask = mask >> 1) {
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if (mask & 0x2) {
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msg_mcast(id, &msg->m_hdr, ctx->ctx_buf, msg->m_hdr.h_len);
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}
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}
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}
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GsLockExit(gd->g_lock);
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}
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void
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GspProcessReply(gs_group_t *gd, gs_context_t *ctx, int sid, char *buf, int rlen,
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NTSTATUS status)
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{
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gs_msg_t *msg;
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int ctx_rlen;
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IO_STATUS_BLOCK *ios = ctx->ctx_ios;
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msg = ctx->ctx_msg;
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if (msg == NULL) {
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err_log(("Error invalid msg in ctx %d, gid %d\n", ctx->ctx_id, gd->g_id));
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GsEventSignal(ctx->ctx_event);
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//xxx: for debugging
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halt(0);
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return;
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}
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if (rlen > 0) {
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PVOID *p = ctx->ctx_rbuf;
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rlen = min(rlen , msg->m_hdr.h_rlen);
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if (p != NULL) {
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if (msg->m_hdr.h_type == GS_MSG_TYPE_MCAST) {
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p += (sid - 1);
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ios += (sid - 1);
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}
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memcpy(*p, buf, rlen);
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}
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} else if (msg->m_hdr.h_type == GS_MSG_TYPE_MCAST) {
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ios += (sid - 1);
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}
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ios->Status = status;
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ios->Information = rlen;
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ctx->ctx_mask &= ~(1 << sid);
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gs_log(("process reply len %d gid %d cid %d nid %d mseq %d sz %d mask %x ios %x\n",
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rlen, gd->g_id, ctx->ctx_id,
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sid, msg->m_hdr.h_mseq, msg->m_hdr.h_rlen, ctx->ctx_mask, ios));
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if (ctx->ctx_mask == 0) {
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gs_event_t ev = ctx->ctx_event;
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if (ctx->ctx_timer) {
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timeKillEvent(ctx->ctx_timer);
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ctx->ctx_timer = 0;
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}
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ctx->ctx_msg = NULL;
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gd->g_send.s_lseq = msg->m_hdr.h_mseq;
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// free msg and signal waiter
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GspRemoveMsg(gd, msg);
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#if 0
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if (ctx->ctx_flags & GS_FLAGS_CLOSE) {
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GspCloseContext(gd, ctx);
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}
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#endif
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if (ev) {
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gs_log(("Signal ctx %d\n", ctx->ctx_id));
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GsEventSignal(ev);
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}
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} else {
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gs_log(("Waiting for more replies %x\n", ctx->ctx_mask));
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// place ctx into timer queue if we haven't already done so
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if (sid == (int)gd->g_nid) {
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ctx->ctx_timer = timeSetEvent(500, 0, (LPTIMECALLBACK)timercallback,
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(DWORD_PTR)ctx, TIME_ONESHOT);
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if (ctx->ctx_timer == 0) {
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printf("Unable to create timer %d\n", GetLastError());
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}
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}
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}
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}
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void
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GspProcessWaitQueue(gs_group_t *gd, gs_seq_info_t *info)
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{
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int i;
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gs_msg_t *last, *cur;
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gs_send_state_t *ss;
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gs_log(("Process wait queue mid %d mseq %d view %d\n",
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gd->g_mid, info->mseq, info->viewnum));
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ss = &gd->g_send;
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// sequence all ready requests
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cur = ss->s_waitqueue;
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if (cur == NULL) {
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err_log(("Gid %d Empty wait queue!\n", gd->g_id));
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halt(1);
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}
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for (i = 0; cur != NULL; i++) {
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cur->m_hdr.h_mseq = info->mseq;
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cur->m_hdr.h_bnum = i * (1 << 16);
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cur->m_hdr.h_mid = gd->g_mid;
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cur->m_hdr.h_viewnum = info->viewnum;
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// piggyback our receive state
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cur->m_hdr.h_lseq = gd->g_send.s_lseq;
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if (cur->m_next == NULL) {
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cur->m_hdr.h_flags |= GS_FLAGS_LAST;
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}
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msg_mcast(gd->g_mset, &cur->m_hdr, cur->m_buf, cur->m_hdr.h_len);
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{
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gs_context_t *sc;
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sc = &ss->s_ctxpool[cur->m_hdr.h_cid];
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sc->ctx_mseq = cur->m_hdr.h_mseq;
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sc->ctx_bnum = cur->m_hdr.h_bnum + 1;
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sc->ctx_flags = cur->m_hdr.h_flags;
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}
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last = cur;
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cur = cur->m_next;
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}
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// Insert waitqueue into receive side queue
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cur = ss->s_waitqueue;
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ss->s_waitqueue = NULL;
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ss->s_mseq = info->mseq+1;
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ss->s_bnum = 0;
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GspOrderInsert(gd, cur, last, info->mseq, 0);
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GspDispatch(gd);
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}
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void
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GspAllocateSequence(gs_group_t *gd)
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{
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gs_seq_info_t info;
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gs_msg_t msg;
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assert(gd->g_send.s_waitqueue != NULL);
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if (gd->g_mid == gd->g_nid) {
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info.mseq = gd->g_global_seq++;
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info.viewnum = gd->g_curview;
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GspProcessWaitQueue(gd, &info);
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} else {
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// remote case
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gs_log(("Allocate a seq from mid %x view %d,%d\n", gd->g_mid,
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gd->g_startview, gd->g_curview));
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msg.m_hdr.h_len = 0;
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msg.m_hdr.h_type = GS_MSG_TYPE_SEQALLOC;
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msg.m_hdr.h_flags = GS_FLAGS_PTP;
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msg.m_hdr.h_viewnum = gd->g_curview;
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msg.m_hdr.h_rlen = sizeof(info);
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msg.m_hdr.h_cid = 0;
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msg.m_hdr.h_gid = gd->g_id;
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msg.m_hdr.h_sid = (gs_memberid_t) gd->g_nid;
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msg.m_hdr.h_mid = gd->g_mid;
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msg.m_hdr.h_mseq = gd->g_send.s_mseq;
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msg.m_hdr.h_lseq = gd->g_send.s_lseq;
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msg.m_hdr.h_bnum = 0;
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memset(msg.m_hdr.h_tag, 0, sizeof(msg.m_hdr.h_tag));
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msg_send(gd->g_mid, &msg.m_hdr, NULL, 0);
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}
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}
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NTSTATUS
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WINAPI
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GsSendDeliveredRequest(HANDLE group, gs_event_t event OPTIONAL,
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gs_tag_t tag, PVOID buf, UINT32 len,
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PVOID rbuf[], UINT32 rlen,
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IO_STATUS_BLOCK ios[],
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HANDLE *context)
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{
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gs_context_t *ctx;
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gs_group_t *gd = (gs_group_t *)group;
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gs_send_state_t *ss;
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BOOLEAN flag;
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gs_msg_t *msg;
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if (gd == NULL || ios == NULL) {
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return ERROR_INVALID_PARAMETER;
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}
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GspOpenContext(gd, &ctx);
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ctx->ctx_flags = GS_FLAGS_DELIVERED;
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if (context != NULL) {
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ctx->ctx_flags |= GS_FLAGS_CONTINUED;
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*context = ctx;
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} else {
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ctx->ctx_flags |= GS_FLAGS_CLOSE;
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}
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ctx->ctx_buf = buf;
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ctx->ctx_rbuf = rbuf;
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ctx->ctx_ios = ios;
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if (event == NULL)
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event = ctx->ctx_syncevent;
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ctx->ctx_event = event;
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msg = msg_alloc(buf, len);
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assert(msg != NULL);
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msg->m_hdr.h_len = (UINT16) len;
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msg->m_hdr.h_type = GS_MSG_TYPE_MCAST;
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msg->m_hdr.h_flags = ctx->ctx_flags | GS_FLAGS_QUEUED;
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msg->m_hdr.h_rlen = (UINT16) rlen;
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msg->m_hdr.h_cid = ctx->ctx_id;
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msg->m_hdr.h_gid = gd->g_id;
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msg->m_hdr.h_sid = (gs_memberid_t) gd->g_nid;
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memcpy(msg->m_hdr.h_tag, tag, sizeof(gs_tag_t));
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ss = &gd->g_send;
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// place context into readylist
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GsLockEnter(gd->g_lock);
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flag = ss->s_waitqueue == NULL ? TRUE : FALSE;
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msg->m_next = ss->s_waitqueue;
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ss->s_waitqueue = msg;
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ctx->ctx_mask = gd->g_mset;
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ctx->ctx_msg = msg;
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msg->m_refcnt++;
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// check if we have already asked for a global sequence number
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if (flag == TRUE) {
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GspAllocateSequence(gd);
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}
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GsLockExit(gd->g_lock);
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// wait for replies or acks
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if (event) {
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gs_log(("Wait on event %x\n", event));
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GsEventWait(event);
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}
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if (ctx->ctx_flags & GS_FLAGS_CLOSE) {
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GspCloseContext(gd, ctx);
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}
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return ERROR_SUCCESS;
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}
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NTSTATUS
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GsSendContinuedRequest(HANDLE context, gs_event_t event OPTIONAL,
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gs_tag_t tag, PVOID buf, UINT32 len,
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PVOID rbuf[], UINT32 rlen,
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IO_STATUS_BLOCK ios[],
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BOOLEAN close)
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{
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gs_context_t *ctx = (gs_context_t *) context;
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gs_group_t *gd;
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gs_send_state_t *ss;
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BOOLEAN flag;
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gs_msg_t *msg;
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if (ctx == NULL || ios == NULL) {
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return ERROR_INVALID_PARAMETER;
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}
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if (rbuf == NULL && rlen > 0) {
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return ERROR_INVALID_PARAMETER;
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}
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if (buf == NULL && len > 0) {
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return ERROR_INVALID_PARAMETER;
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}
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gd = GspLookupGroup(ctx->ctx_gid);
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assert(gd != NULL);
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msg = msg_alloc(buf, len);
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assert(msg != NULL);
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if (close == TRUE) {
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ctx->ctx_flags &= ~GS_FLAGS_CONTINUED;
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ctx->ctx_flags |= GS_FLAGS_CLOSE;
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}
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if (event == NULL)
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event = ctx->ctx_syncevent;
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ctx->ctx_event = event;
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ctx->ctx_buf = buf;
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ctx->ctx_rbuf = rbuf;
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ctx->ctx_ios = ios;
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ctx->ctx_msg = msg;
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msg->m_hdr.h_len = (UINT16) len;
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msg->m_hdr.h_type = GS_MSG_TYPE_MCAST;
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msg->m_hdr.h_flags = ctx->ctx_flags | GS_FLAGS_QUEUED;
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msg->m_hdr.h_rlen = (UINT16) rlen;
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msg->m_hdr.h_cid = ctx->ctx_id;
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msg->m_hdr.h_gid = gd->g_id;
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msg->m_hdr.h_sid = gd->g_nid;
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memcpy(msg->m_hdr.h_tag, tag, sizeof(gs_tag_t));
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msg->m_hdr.h_mseq = ctx->ctx_mseq;
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msg->m_hdr.h_bnum = ctx->ctx_bnum++;
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GsLockEnter(gd->g_lock);
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msg->m_hdr.h_lseq = gd->g_send.s_lseq;
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msg->m_hdr.h_mid = gd->g_mid;
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msg->m_hdr.h_viewnum = gd->g_curview;
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ctx->ctx_mask = gd->g_mset;
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msg->m_refcnt++;
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msg_mcast(gd->g_mset, &msg->m_hdr, buf, len);
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GspOrderInsert(gd, msg, msg, ctx->ctx_mseq, ctx->ctx_bnum);
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GspDispatch(gd);
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GsLockExit(gd->g_lock);
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// wait for replies or acks
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if (event != NULL) {
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gs_log(("Wait on event %x\n", event));
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GsEventWait(event);
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}
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if (ctx->ctx_flags & GS_FLAGS_CLOSE) {
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GspCloseContext(gd, ctx);
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}
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return ERROR_SUCCESS;
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}
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NTSTATUS
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GspSendDirectedRequest(gs_group_t *gd, gs_context_t *ctx, gs_event_t event,
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int memberid, gs_tag_t tag,
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PVOID buf, UINT32 len,
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PVOID rbuf, UINT32 rlen,
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IO_STATUS_BLOCK *ios,
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UINT32 flags, UINT32 type)
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{
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gs_send_state_t *ss;
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gs_nid_t mid;
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gs_msg_t *msg;
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int err = ERROR_SUCCESS;
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if (rlen > (UINT32)GS_DEFAULT_MAX_MSG_SZ) {
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return ERROR_INVALID_PARAMETER;
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}
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assert(gd != NULL);
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msg = msg_alloc(buf, len);
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assert(msg != NULL);
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if (event == NULL)
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event = ctx->ctx_syncevent;
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ctx->ctx_flags = (UINT16) flags;
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ctx->ctx_event = event;
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ctx->ctx_buf = buf;
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ctx->ctx_rbuf = rbuf;
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ctx->ctx_ios = ios;
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msg->m_hdr.h_len = (UINT16) len;
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msg->m_hdr.h_type = (UINT16) type;
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msg->m_hdr.h_flags = ctx->ctx_flags | GS_FLAGS_PTP;
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msg->m_hdr.h_rlen = (UINT16) rlen;
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msg->m_hdr.h_cid = ctx->ctx_id;
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msg->m_hdr.h_gid = gd->g_id;
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msg->m_hdr.h_sid = gd->g_nid;
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msg->m_hdr.h_mid = (gs_memberid_t) memberid;
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memcpy(msg->m_hdr.h_tag, tag, sizeof(gs_tag_t));
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GsLockEnter(gd->g_lock);
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ctx->ctx_msg = msg;
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ctx->ctx_mask = 1 << memberid;
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ss = &gd->g_send;
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msg->m_hdr.h_lseq = ss->s_lseq;
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msg->m_hdr.h_mseq = ss->s_mseq;
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msg->m_hdr.h_bnum = ss->s_bnum++;
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msg->m_hdr.h_viewnum = gd->g_curview;
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if (gd->g_nid == (gs_memberid_t )memberid) {
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// insert into receive queue
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msg->m_refcnt++;
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msg->m_hdr.h_flags |= GS_FLAGS_QUEUED;
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// insert msg into dispatch queue at proper order
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GspUOrderInsert(gd, msg, msg, msg->m_hdr.h_mseq, msg->m_hdr.h_bnum);
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GspDispatch(gd);
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} else {
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err = msg_send((gs_memberid_t) memberid, &msg->m_hdr, buf, len);
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}
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GsLockExit(gd->g_lock);
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// wait for replies or acks
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if (!err && event != NULL) {
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GsEventWait(event);
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}
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if (ctx->ctx_flags & GS_FLAGS_CLOSE) {
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GspCloseContext(gd, ctx);
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}
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return err;
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}
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NTSTATUS
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WINAPI
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GsSendDirectedRequest(HANDLE group, gs_event_t event OPTIONAL,
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int memberid, gs_tag_t tag,
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PVOID buf, UINT32 len,
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PVOID rbuf, UINT32 rlen,
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IO_STATUS_BLOCK *ios,
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HANDLE *context)
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{
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gs_group_t *gd = (gs_group_t *)group;
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gs_context_t *ctx;
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NTSTATUS err;
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if (gd == NULL) {
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return ERROR_INVALID_HANDLE;
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}
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GspOpenContext(gd, &ctx);
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ctx->ctx_flags = GS_FLAGS_DELIVERED | GS_FLAGS_CONTINUED;
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if (context != NULL) {
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ctx->ctx_flags |= GS_FLAGS_CONTINUED;
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*context = ctx;
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} else {
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ctx->ctx_flags |= GS_FLAGS_CLOSE;
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}
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err = GspSendDirectedRequest(gd, ctx, event,
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memberid, tag, buf, len, rbuf, rlen,
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ios,
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ctx->ctx_flags, GS_MSG_TYPE_UCAST);
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if (err != ERROR_SUCCESS) {
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GspCloseContext(gd, ctx);
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}
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return err;
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}
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NTSTATUS
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GspSendRequest(gs_group_t *gd, gs_context_t *ctx, gs_event_t event,
|
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int type, gs_sequence_t mid, gs_tag_t tag,
|
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PVOID buf, UINT32 len,
|
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PVOID rbuf[], UINT32 rlen,
|
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IO_STATUS_BLOCK ios[],
|
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UINT32 flags, gs_join_info_t *info)
|
|
{
|
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gs_send_state_t *ss;
|
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BOOLEAN flag;
|
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gs_msg_t *msg;
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|
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assert(gd != NULL);
|
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msg = msg_alloc(buf, len);
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|
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assert(msg != NULL);
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msg->m_hdr.h_len = (UINT16) len;
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msg->m_hdr.h_type = (UINT16) type;
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msg->m_hdr.h_flags = (UINT16) flags;
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msg->m_hdr.h_rlen = (UINT16) rlen;
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msg->m_hdr.h_cid = ctx->ctx_id;
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msg->m_hdr.h_gid = gd->g_id;
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msg->m_hdr.h_sid = (gs_memberid_t) gd->g_nid;
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memcpy(msg->m_hdr.h_tag, tag, sizeof(gs_tag_t));
|
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msg->m_hdr.h_mseq = info->mseq;
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msg->m_hdr.h_lseq = info->mseq;
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msg->m_hdr.h_bnum = ctx->ctx_bnum++;
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msg->m_hdr.h_mid = (gs_memberid_t) mid;
|
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msg->m_hdr.h_viewnum = info->viewnum;
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|
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if (event == NULL)
|
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event = ctx->ctx_syncevent;
|
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ctx->ctx_buf = buf;
|
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ctx->ctx_rbuf = rbuf;
|
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ctx->ctx_ios = ios;
|
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ctx->ctx_event = event;
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ctx->ctx_msg = msg;
|
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ctx->ctx_mask = info->mset;
|
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ctx->ctx_mseq = info->mseq;
|
|
ctx->ctx_flags = (UINT16) flags;
|
|
|
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GsLockEnter(gd->g_lock);
|
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|
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gd->g_send.s_mseq = info->mseq+1;
|
|
gd->g_send.s_bnum = 0;
|
|
|
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msg_mcast(info->mset, &msg->m_hdr, buf, len);
|
|
|
|
if (info->mset & (1 << gd->g_nid)) {
|
|
msg->m_hdr.h_flags |= GS_FLAGS_QUEUED;
|
|
msg->m_refcnt++;
|
|
GspOrderInsert(gd, msg, msg, info->mseq, msg->m_hdr.h_bnum);
|
|
GspDispatch(gd);
|
|
} else {
|
|
msg->m_hdr.h_flags |= GS_FLAGS_PTP;
|
|
ctx->ctx_timer = timeSetEvent(500, 0, (LPTIMECALLBACK)timercallback,
|
|
(DWORD_PTR)ctx, TIME_PERIODIC);
|
|
if (ctx->ctx_timer == 0) {
|
|
printf("Unable to create timer %d\n", GetLastError());
|
|
}
|
|
}
|
|
|
|
GsLockExit(gd->g_lock);
|
|
|
|
// wait for replies or acks
|
|
if (event != NULL) {
|
|
GsEventWait(event);
|
|
}
|
|
|
|
if (ctx->ctx_flags & GS_FLAGS_CLOSE) {
|
|
GspCloseContext(gd, ctx);
|
|
}
|
|
|
|
|
|
return ERROR_SUCCESS;
|
|
}
|
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