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.\" 
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.\" under the terms of the GNU Free Documentation License, Version 1.3
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.TH "MONGOC_CLIENT_POOL_T" "3" "2016\(hy10\(hy12" "MongoDB C Driver"
.SH NAME
mongoc_client_pool_t \- Connection pooling abstraction
.SH "SYNOPSIS"

.nf
.nf
typedef struct _mongoc_client_pool_t mongoc_client_pool_t
.fi
.fi

.B mongoc_client_pool_t
is the basis for multi\(hythreading in the MongoDB C driver. Since
.B mongoc_client_t
structures are not thread\(hysafe, this structure is used to retrieve a new
.B mongoc_client_t
for a given thread. This structure
.B is thread-safe
.

.SH "EXAMPLE"

.nf
#include <mongoc.h>

static void *
worker (void *data)
{
   mongoc_client_pool_t *pool = data;
   mongoc_client_t *client;

   do {
      client = mongoc_client_pool_pop (pool);
      /*
       * Do something with client. If you are writing an HTTP server, you
       * probably only want to hold onto the client for the portion of the
       * request performing database queries.
       */
      mongoc_client_pool_push (pool, client);
   } while (!inShutdown);

   return NULL;
}

int main (int argc, char *argv[])
{
   mongoc_client_pool_t *pool;
   mongoc_uri_t *uri;
   pthread_t thread[10];
   unsigned i;
   void *ret;

   mongoc_init ();

   uri = mongoc_uri_new ("mongodb://mdb1.example.com/?minPoolSize=16");
   pool = mongoc_client_pool_new (uri);

   for (i = 0; i < 10; i++) {
      pthread_create (&thread, NULL, worker, pool);
   }

   mongoc_uri_destroy (uri);

   for (i = 0; i < 10; i++) {
      pthread_join (threads [i], &ret);
   }

   mongoc_cleanup ();

   return 0;
}
.fi


.B
.SH COLOPHON
This page is part of MongoDB C Driver.
Please report any bugs at https://jira.mongodb.org/browse/CDRIVER.