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Diffstat (limited to 'src/third_party/wiredtiger/examples/c/ex_thread.c')
-rw-r--r-- | src/third_party/wiredtiger/examples/c/ex_thread.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/third_party/wiredtiger/examples/c/ex_thread.c b/src/third_party/wiredtiger/examples/c/ex_thread.c new file mode 100644 index 00000000000..a72211b6243 --- /dev/null +++ b/src/third_party/wiredtiger/examples/c/ex_thread.c @@ -0,0 +1,127 @@ +/*- + * Public Domain 2014-2016 MongoDB, Inc. + * Public Domain 2008-2014 WiredTiger, Inc. + * + * This is free and unencumbered software released into the public domain. + * + * Anyone is free to copy, modify, publish, use, compile, sell, or + * distribute this software, either in source code form or as a compiled + * binary, for any purpose, commercial or non-commercial, and by any + * means. + * + * In jurisdictions that recognize copyright laws, the author or authors + * of this software dedicate any and all copyright interest in the + * software to the public domain. We make this dedication for the benefit + * of the public at large and to the detriment of our heirs and + * successors. We intend this dedication to be an overt act of + * relinquishment in perpetuity of all present and future rights to this + * software under copyright law. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * ex_thread.c + * This is an example demonstrating how to create and access a simple + * table from multiple threads. + */ + +#ifndef _WIN32 +#include <pthread.h> +#endif +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#ifdef _WIN32 +#include "windows_shim.h" +#endif + +#include <wiredtiger.h> + +static const char *home; + +void *scan_thread(void *arg); + +#define NUM_THREADS 10 + +/*! [thread scan] */ +void * +scan_thread(void *conn_arg) +{ + WT_CONNECTION *conn; + WT_CURSOR *cursor; + WT_SESSION *session; + const char *key, *value; + int ret; + + conn = conn_arg; + ret = conn->open_session(conn, NULL, NULL, &session); + ret = session->open_cursor( + session, "table:access", NULL, NULL, &cursor); + + /* Show all records. */ + while ((ret = cursor->next(cursor)) == 0) { + ret = cursor->get_key(cursor, &key); + ret = cursor->get_value(cursor, &value); + + printf("Got record: %s : %s\n", key, value); + } + if (ret != WT_NOTFOUND) + fprintf(stderr, + "WT_CURSOR.next: %s\n", session->strerror(session, ret)); + + return (NULL); +} +/*! [thread scan] */ + +/*! [thread main] */ +int +main(void) +{ + WT_CONNECTION *conn; + WT_SESSION *session; + WT_CURSOR *cursor; + pthread_t threads[NUM_THREADS]; + int i, ret; + + /* + * Create a clean test directory for this run of the test program if the + * environment variable isn't already set (as is done by make check). + */ + if (getenv("WIREDTIGER_HOME") == NULL) { + home = "WT_HOME"; + ret = system("rm -rf WT_HOME && mkdir WT_HOME"); + } else + home = NULL; + + if ((ret = wiredtiger_open(home, NULL, "create", &conn)) != 0) + fprintf(stderr, "Error connecting to %s: %s\n", + home, wiredtiger_strerror(ret)); + /* Note: further error checking omitted for clarity. */ + + ret = conn->open_session(conn, NULL, NULL, &session); + ret = session->create(session, "table:access", + "key_format=S,value_format=S"); + ret = session->open_cursor(session, "table:access", NULL, + "overwrite", &cursor); + cursor->set_key(cursor, "key1"); + cursor->set_value(cursor, "value1"); + ret = cursor->insert(cursor); + ret = session->close(session, NULL); + + for (i = 0; i < NUM_THREADS; i++) + ret = pthread_create(&threads[i], NULL, scan_thread, conn); + + for (i = 0; i < NUM_THREADS; i++) + ret = pthread_join(threads[i], NULL); + + ret = conn->close(conn, NULL); + + return (ret); +} +/*! [thread main] */ |