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[chromium-blink-merge.git] / third_party / sqlite / sqlite-src-3080704 / test / threadtest1.c
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1 /*
2 ** 2002 January 15
3 **
4 ** The author disclaims copyright to this source code. In place of
5 ** a legal notice, here is a blessing:
6 **
7 ** May you do good and not evil.
8 ** May you find forgiveness for yourself and forgive others.
9 ** May you share freely, never taking more than you give.
11 *************************************************************************
12 ** This file implements a simple standalone program used to test whether
13 ** or not the SQLite library is threadsafe.
15 ** Testing the thread safety of SQLite is difficult because there are very
16 ** few places in the code that are even potentially unsafe, and those
17 ** places execute for very short periods of time. So even if the library
18 ** is compiled with its mutexes disabled, it is likely to work correctly
19 ** in a multi-threaded program most of the time.
21 ** This file is NOT part of the standard SQLite library. It is used for
22 ** testing only.
24 #include "sqlite.h"
25 #include <pthread.h>
26 #include <sched.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
33 ** Enable for tracing
35 static int verbose = 0;
38 ** Come here to die.
40 static void Exit(int rc){
41 exit(rc);
44 extern char *sqlite3_mprintf(const char *zFormat, ...);
45 extern char *sqlite3_vmprintf(const char *zFormat, va_list);
48 ** When a lock occurs, yield.
50 static int db_is_locked(void *NotUsed, int iCount){
51 /* sched_yield(); */
52 if( verbose ) printf("BUSY %s #%d\n", (char*)NotUsed, iCount);
53 usleep(100);
54 return iCount<25;
58 ** Used to accumulate query results by db_query()
60 struct QueryResult {
61 const char *zFile; /* Filename - used for error reporting */
62 int nElem; /* Number of used entries in azElem[] */
63 int nAlloc; /* Number of slots allocated for azElem[] */
64 char **azElem; /* The result of the query */
68 ** The callback function for db_query
70 static int db_query_callback(
71 void *pUser, /* Pointer to the QueryResult structure */
72 int nArg, /* Number of columns in this result row */
73 char **azArg, /* Text of data in all columns */
74 char **NotUsed /* Names of the columns */
76 struct QueryResult *pResult = (struct QueryResult*)pUser;
77 int i;
78 if( pResult->nElem + nArg >= pResult->nAlloc ){
79 if( pResult->nAlloc==0 ){
80 pResult->nAlloc = nArg+1;
81 }else{
82 pResult->nAlloc = pResult->nAlloc*2 + nArg + 1;
84 pResult->azElem = realloc( pResult->azElem, pResult->nAlloc*sizeof(char*));
85 if( pResult->azElem==0 ){
86 fprintf(stdout,"%s: malloc failed\n", pResult->zFile);
87 return 1;
90 if( azArg==0 ) return 0;
91 for(i=0; i<nArg; i++){
92 pResult->azElem[pResult->nElem++] =
93 sqlite3_mprintf("%s",azArg[i] ? azArg[i] : "");
95 return 0;
99 ** Execute a query against the database. NULL values are returned
100 ** as an empty string. The list is terminated by a single NULL pointer.
102 char **db_query(sqlite *db, const char *zFile, const char *zFormat, ...){
103 char *zSql;
104 int rc;
105 char *zErrMsg = 0;
106 va_list ap;
107 struct QueryResult sResult;
108 va_start(ap, zFormat);
109 zSql = sqlite3_vmprintf(zFormat, ap);
110 va_end(ap);
111 memset(&sResult, 0, sizeof(sResult));
112 sResult.zFile = zFile;
113 if( verbose ) printf("QUERY %s: %s\n", zFile, zSql);
114 rc = sqlite3_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
115 if( rc==SQLITE_SCHEMA ){
116 if( zErrMsg ) free(zErrMsg);
117 rc = sqlite3_exec(db, zSql, db_query_callback, &sResult, &zErrMsg);
119 if( verbose ) printf("DONE %s %s\n", zFile, zSql);
120 if( zErrMsg ){
121 fprintf(stdout,"%s: query failed: %s - %s\n", zFile, zSql, zErrMsg);
122 free(zErrMsg);
123 free(zSql);
124 Exit(1);
126 sqlite3_free(zSql);
127 if( sResult.azElem==0 ){
128 db_query_callback(&sResult, 0, 0, 0);
130 sResult.azElem[sResult.nElem] = 0;
131 return sResult.azElem;
135 ** Execute an SQL statement.
137 void db_execute(sqlite *db, const char *zFile, const char *zFormat, ...){
138 char *zSql;
139 int rc;
140 char *zErrMsg = 0;
141 va_list ap;
142 va_start(ap, zFormat);
143 zSql = sqlite3_vmprintf(zFormat, ap);
144 va_end(ap);
145 if( verbose ) printf("EXEC %s: %s\n", zFile, zSql);
147 rc = sqlite3_exec(db, zSql, 0, 0, &zErrMsg);
148 }while( rc==SQLITE_BUSY );
149 if( verbose ) printf("DONE %s: %s\n", zFile, zSql);
150 if( zErrMsg ){
151 fprintf(stdout,"%s: command failed: %s - %s\n", zFile, zSql, zErrMsg);
152 free(zErrMsg);
153 sqlite3_free(zSql);
154 Exit(1);
156 sqlite3_free(zSql);
160 ** Free the results of a db_query() call.
162 void db_query_free(char **az){
163 int i;
164 for(i=0; az[i]; i++){
165 sqlite3_free(az[i]);
167 free(az);
171 ** Check results
173 void db_check(const char *zFile, const char *zMsg, char **az, ...){
174 va_list ap;
175 int i;
176 char *z;
177 va_start(ap, az);
178 for(i=0; (z = va_arg(ap, char*))!=0; i++){
179 if( az[i]==0 || strcmp(az[i],z)!=0 ){
180 fprintf(stdout,"%s: %s: bad result in column %d: %s\n",
181 zFile, zMsg, i+1, az[i]);
182 db_query_free(az);
183 Exit(1);
186 va_end(ap);
187 db_query_free(az);
190 pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
191 pthread_cond_t sig = PTHREAD_COND_INITIALIZER;
192 int thread_cnt = 0;
194 static void *worker_bee(void *pArg){
195 const char *zFilename = (char*)pArg;
196 char *azErr;
197 int i, cnt;
198 int t = atoi(zFilename);
199 char **az;
200 sqlite *db;
202 pthread_mutex_lock(&lock);
203 thread_cnt++;
204 pthread_mutex_unlock(&lock);
205 printf("%s: START\n", zFilename);
206 fflush(stdout);
207 for(cnt=0; cnt<10; cnt++){
208 sqlite3_open(&zFilename[2], &db);
209 if( db==0 ){
210 fprintf(stdout,"%s: can't open\n", zFilename);
211 Exit(1);
213 sqlite3_busy_handler(db, db_is_locked, zFilename);
214 db_execute(db, zFilename, "CREATE TABLE t%d(a,b,c);", t);
215 for(i=1; i<=100; i++){
216 db_execute(db, zFilename, "INSERT INTO t%d VALUES(%d,%d,%d);",
217 t, i, i*2, i*i);
219 az = db_query(db, zFilename, "SELECT count(*) FROM t%d", t);
220 db_check(zFilename, "tX size", az, "100", 0);
221 az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
222 db_check(zFilename, "tX avg", az, "101", 0);
223 db_execute(db, zFilename, "DELETE FROM t%d WHERE a>50", t);
224 az = db_query(db, zFilename, "SELECT avg(b) FROM t%d", t);
225 db_check(zFilename, "tX avg2", az, "51", 0);
226 for(i=1; i<=50; i++){
227 char z1[30], z2[30];
228 az = db_query(db, zFilename, "SELECT b, c FROM t%d WHERE a=%d", t, i);
229 sprintf(z1, "%d", i*2);
230 sprintf(z2, "%d", i*i);
231 db_check(zFilename, "readback", az, z1, z2, 0);
233 db_execute(db, zFilename, "DROP TABLE t%d;", t);
234 sqlite3_close(db);
236 printf("%s: END\n", zFilename);
237 /* unlink(zFilename); */
238 fflush(stdout);
239 pthread_mutex_lock(&lock);
240 thread_cnt--;
241 if( thread_cnt<=0 ){
242 pthread_cond_signal(&sig);
244 pthread_mutex_unlock(&lock);
245 return 0;
248 int main(int argc, char **argv){
249 char *zFile;
250 int i, n;
251 pthread_t id;
252 if( argc>2 && strcmp(argv[1], "-v")==0 ){
253 verbose = 1;
254 argc--;
255 argv++;
257 if( argc<2 || (n=atoi(argv[1]))<1 ) n = 10;
258 for(i=0; i<n; i++){
259 char zBuf[200];
260 sprintf(zBuf, "testdb-%d", (i+1)/2);
261 unlink(zBuf);
263 for(i=0; i<n; i++){
264 zFile = sqlite3_mprintf("%d.testdb-%d", i%2+1, (i+2)/2);
265 if( (i%2)==0 ){
266 /* Remove both the database file and any old journal for the file
267 ** being used by this thread and the next one. */
268 char *zDb = &zFile[2];
269 char *zJournal = sqlite3_mprintf("%s-journal", zDb);
270 unlink(zDb);
271 unlink(zJournal);
272 free(zJournal);
275 pthread_create(&id, 0, worker_bee, (void*)zFile);
276 pthread_detach(id);
278 pthread_mutex_lock(&lock);
279 while( thread_cnt>0 ){
280 pthread_cond_wait(&sig, &lock);
282 pthread_mutex_unlock(&lock);
283 for(i=0; i<n; i++){
284 char zBuf[200];
285 sprintf(zBuf, "testdb-%d", (i+1)/2);
286 unlink(zBuf);
288 return 0;