128 lines
3.5 KiB
C
128 lines
3.5 KiB
C
/*-
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* Public Domain 2014-2015 MongoDB, Inc.
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* Public Domain 2008-2014 WiredTiger, Inc.
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*
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* This is free and unencumbered software released into the public domain.
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*
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* Anyone is free to copy, modify, publish, use, compile, sell, or
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* distribute this software, either in source code form or as a compiled
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* binary, for any purpose, commercial or non-commercial, and by any
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* means.
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*
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* In jurisdictions that recognize copyright laws, the author or authors
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* of this software dedicate any and all copyright interest in the
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* software to the public domain. We make this dedication for the benefit
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* of the public at large and to the detriment of our heirs and
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* successors. We intend this dedication to be an overt act of
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* relinquishment in perpetuity of all present and future rights to this
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* software under copyright law.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* ex_thread.c
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* This is an example demonstrating how to create and access a simple
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* table from multiple threads.
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*/
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#ifndef _WIN32
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#include <pthread.h>
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifdef _WIN32
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#include "windows_shim.h"
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#endif
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#include <wiredtiger.h>
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static const char *home;
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void *scan_thread(void *arg);
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#define NUM_THREADS 10
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/*! [thread scan] */
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void *
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scan_thread(void *conn_arg)
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{
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WT_CONNECTION *conn;
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WT_CURSOR *cursor;
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WT_SESSION *session;
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const char *key, *value;
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int ret;
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conn = conn_arg;
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ret = conn->open_session(conn, NULL, NULL, &session);
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ret = session->open_cursor(
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session, "table:access", NULL, NULL, &cursor);
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/* Show all records. */
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while ((ret = cursor->next(cursor)) == 0) {
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ret = cursor->get_key(cursor, &key);
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ret = cursor->get_value(cursor, &value);
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printf("Got record: %s : %s\n", key, value);
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}
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if (ret != WT_NOTFOUND)
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fprintf(stderr,
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"WT_CURSOR.next: %s\n", session->strerror(session, ret));
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return (NULL);
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}
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/*! [thread scan] */
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/*! [thread main] */
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int
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main(void)
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{
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WT_CONNECTION *conn;
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WT_SESSION *session;
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WT_CURSOR *cursor;
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pthread_t threads[NUM_THREADS];
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int i, ret;
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/*
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* Create a clean test directory for this run of the test program if the
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* environment variable isn't already set (as is done by make check).
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*/
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if (getenv("WIREDTIGER_HOME") == NULL) {
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home = "WT_HOME";
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ret = system("rm -rf WT_HOME && mkdir WT_HOME");
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} else
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home = NULL;
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if ((ret = wiredtiger_open(home, NULL, "create", &conn)) != 0)
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fprintf(stderr, "Error connecting to %s: %s\n",
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home, wiredtiger_strerror(ret));
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/* Note: further error checking omitted for clarity. */
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ret = conn->open_session(conn, NULL, NULL, &session);
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ret = session->create(session, "table:access",
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"key_format=S,value_format=S");
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ret = session->open_cursor(session, "table:access", NULL,
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"overwrite", &cursor);
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cursor->set_key(cursor, "key1");
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cursor->set_value(cursor, "value1");
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ret = cursor->insert(cursor);
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ret = session->close(session, NULL);
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for (i = 0; i < NUM_THREADS; i++)
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ret = pthread_create(&threads[i], NULL, scan_thread, conn);
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for (i = 0; i < NUM_THREADS; i++)
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ret = pthread_join(threads[i], NULL);
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ret = conn->close(conn, NULL);
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return (ret);
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}
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/*! [thread main] */
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