nats.zig/deps/nats.c/examples/libevent-pub.c
torque 79a45fd2e3
git subrepo clone (merge) --branch=v3.6.1 https://github.com/nats-io/nats.c.git deps/nats.c
subrepo:
  subdir:   "deps/nats.c"
  merged:   "66cec7f"
upstream:
  origin:   "https://github.com/nats-io/nats.c.git"
  branch:   "v3.6.1"
  commit:   "66cec7f"
git-subrepo:
  version:  "0.4.6"
  commit:   "b8b46501e"
2023-08-15 00:21:33 -07:00

148 lines
3.8 KiB
C

// Copyright 2016-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "adapters/libevent.h"
#include "examples.h"
#ifndef WIN32
#include <pthread.h>
#define THREAD_T pthread_t
#define THREAD_FN void *
#define THREAD_RETURN() return (NULL)
#define THREAD_START(threadvar, fn, arg) \
pthread_create(&(threadvar), NULL, fn, arg)
#define THREAD_JOIN(th) pthread_join(th, NULL)
#else
#include <process.h>
#define THREAD_T HANDLE
#define THREAD_FN unsigned __stdcall
#define THREAD_RETURN() return (0)
#define THREAD_START(threadvar, fn, arg) do { \
uintptr_t threadhandle = _beginthreadex(NULL,0,fn,(arg),0,NULL); \
(threadvar) = (HANDLE) threadhandle; \
} while (0)
#define THREAD_JOIN(th) WaitForSingleObject(th, INFINITE)
#endif
static const char *usage = ""\
"-txt text to send (default is 'hello')\n" \
"-count number of messages to send\n";
typedef struct
{
natsConnection *conn;
natsStatus status;
} threadInfo;
static THREAD_FN
pubThread(void *arg)
{
threadInfo *info = (threadInfo*) arg;
natsStatus s = NATS_OK;
for (count = 0; (s == NATS_OK) && (count < total); count++)
s = natsConnection_PublishString(info->conn, subj, payload);
if (s == NATS_OK)
s = natsConnection_Flush(info->conn);
natsConnection_Close(info->conn);
info->status = s;
if (s != NATS_OK)
nats_PrintLastErrorStack(stderr);
THREAD_RETURN();
}
int main(int argc, char **argv)
{
natsConnection *conn = NULL;
natsOptions *opts = NULL;
natsSubscription *sub = NULL;
natsStatus s = NATS_OK;
struct event_base *evLoop= NULL;
THREAD_T pub;
threadInfo info;
nats_Open(-1);
opts = parseArgs(argc, argv, usage);
printf("Sending %" PRId64 " messages to subject '%s'\n", total, subj);
// One time initialization of things that we need.
natsLibevent_Init();
// Create a loop.
evLoop = event_base_new();
if (evLoop == NULL)
s = NATS_ERR;
// Indicate which loop and callbacks to use once connected.
if (s == NATS_OK)
s = natsOptions_SetEventLoop(opts, (void*) evLoop,
natsLibevent_Attach,
natsLibevent_Read,
natsLibevent_Write,
natsLibevent_Detach);
if (s == NATS_OK)
s = natsConnection_Connect(&conn, opts);
if (s == NATS_OK)
start = nats_Now();
if (s == NATS_OK)
{
info.conn = conn;
info.status = NATS_OK;
THREAD_START(pub, pubThread, (void*) &info);
}
if (s == NATS_OK)
{
event_base_dispatch(evLoop);
THREAD_JOIN(pub);
s = info.status;
}
if (s == NATS_OK)
{
printPerf("Sent");
}
else
{
printf("Error: %d - %s\n", s, natsStatus_GetText(s));
nats_PrintLastErrorStack(stderr);
}
// Destroy all our objects to avoid report of memory leak
natsSubscription_Destroy(sub);
natsConnection_Destroy(conn);
natsOptions_Destroy(opts);
if (evLoop != NULL)
event_base_free(evLoop);
// To silence reports of memory still in used with valgrind
nats_Close();
libevent_global_shutdown();
return 0;
}