--- /dev/null
+/*
+** 2017 June 7
+**
+** The author disclaims copyright to this source code. In place of
+** a legal notice, here is a blessing:
+**
+** May you do good and not evil.
+** May you find forgiveness for yourself and forgive others.
+** May you share freely, never taking more than you give.
+**
+*************************************************************************
+**
+** Simple multi-threaded server used for informal testing of concurrency
+** between connections in different threads. Listens for tcp/ip connections
+** on port 9999 of the 127.0.0.1 interface only. To build:
+**
+** gcc -g $(TOP)/tool/tserver.c sqlite3.o -lpthread -o tserver
+**
+** To run using "x.db" as the db file:
+**
+** ./tserver x.db
+**
+** To connect, open a client socket on port 9999 and start sending commands.
+** Commands are either SQL - which must be terminated by a semi-colon, or
+** dot-commands, which must be terminated by a newline. If an SQL statement
+** is seen, it is prepared and added to an internal list.
+**
+** Dot-commands are:
+**
+** .list Display all SQL statements in the list.
+** .quit Disconnect.
+** .run Run all SQL statements in the list.
+** .repeats N Configure the number of repeats per ".run".
+** .seconds N Configure the number of seconds to ".run" for.
+**
+** Example input:
+**
+** BEGIN;
+** INSERT INTO t1 VALUES(randomblob(10), randomblob(100));
+** INSERT INTO t1 VALUES(randomblob(10), randomblob(100));
+** INSERT INTO t1 VALUES(randomblob(10), randomblob(100));
+** COMMIT;
+** .repeats 100000
+** .run
+**
+*/
+#define TSERVER_PORTNUMBER 9999
+
+#include <arpa/inet.h>
+#include <assert.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include "sqlite3.h"
+
+/* Database used by this server */
+static char *zDatabaseName = 0;
+
+typedef struct ClientCtx ClientCtx;
+struct ClientCtx {
+ sqlite3 *db; /* Database handle for this client */
+ int fd; /* Client fd */
+ int nRepeat; /* Number of times to repeat SQL */
+ int nSecond; /* Number of seconds to run for */
+ sqlite3_stmt **apPrepare; /* Array of prepared statements */
+ int nPrepare; /* Valid size of apPrepare[] */
+ int nAlloc; /* Allocated size of apPrepare[] */
+};
+
+static int is_eol(int i){
+ return (i=='\n' || i=='\r');
+}
+static int is_whitespace(int i){
+ return (i==' ' || i=='\t' || is_eol(i));
+}
+
+static void trim_string(const char **pzStr, int *pnStr){
+ const char *zStr = *pzStr;
+ int nStr = *pnStr;
+
+ while( nStr>0 && is_whitespace(zStr[0]) ){
+ zStr++;
+ nStr--;
+ }
+ while( nStr>0 && is_whitespace(zStr[nStr-1]) ){
+ nStr--;
+ }
+
+ *pzStr = zStr;
+ *pnStr = nStr;
+}
+
+static int send_message(ClientCtx *p, const char *zFmt, ...){
+ char *zMsg;
+ va_list ap; /* Vararg list */
+ va_start(ap, zFmt);
+ int res = -1;
+
+ zMsg = sqlite3_vmprintf(zFmt, ap);
+ if( zMsg ){
+ res = write(p->fd, zMsg, strlen(zMsg));
+ }
+ sqlite3_free(zMsg);
+ va_end(ap);
+
+ return (res<0);
+}
+
+static int handle_some_sql(ClientCtx *p, const char *zSql, int nSql){
+ const char *zTail = zSql;
+ int nTail = nSql;
+ int rc = SQLITE_OK;
+
+ while( rc==SQLITE_OK ){
+ if( p->nPrepare>=p->nAlloc ){
+ int nByte = (p->nPrepare+32) * sizeof(sqlite3_stmt*);
+ sqlite3_stmt **apNew = sqlite3_realloc(p->apPrepare, nByte);
+ if( apNew ){
+ p->apPrepare = apNew;
+ p->nAlloc = p->nPrepare+32;
+ }else{
+ rc = SQLITE_NOMEM;
+ break;
+ }
+ }
+ rc = sqlite3_prepare_v2(
+ p->db, zTail, nTail, &p->apPrepare[p->nPrepare], &zTail
+ );
+ if( rc!=SQLITE_OK ){
+ send_message(p, "error - %s\n", sqlite3_errmsg(p->db));
+ rc = 1;
+ break;
+ }
+ if( p->apPrepare[p->nPrepare]==0 ){
+ break;
+ }
+ p->nPrepare++;
+ nTail = nSql - (zTail-zSql);
+ rc = send_message(p, "ok (%d SQL statements)\n", p->nPrepare);
+ }
+
+ return rc;
+}
+
+static sqlite3_int64 get_timer(void){
+ struct timeval t;
+ gettimeofday(&t, 0);
+ return ((sqlite3_int64)t.tv_usec / 1000) + ((sqlite3_int64)t.tv_sec * 1000);
+}
+
+static int handle_dot_command(ClientCtx *p, const char *zCmd, int nCmd){
+ assert( zCmd[0]=='.' );
+ int n;
+ int rc = 0;
+ const char *z = &zCmd[1];
+ const char *zArg;
+ int nArg;
+
+ for(n=0; n<(nCmd-1); n++){
+ if( is_whitespace(z[n]) ) break;
+ }
+
+ zArg = &z[n];
+ nArg = nCmd-n;
+ trim_string(&zArg, &nArg);
+
+ if( n>=1 && n<=4 && 0==strncmp(z, "list", n) ){
+ int i;
+ for(i=0; rc==0 && i<p->nPrepare; i++){
+ const char *zSql = sqlite3_sql(p->apPrepare[i]);
+ int nSql = strlen(zSql);
+ trim_string(&zSql, &nSql);
+ rc = send_message(p, "%d: %.*s\n", i, nSql, zSql);
+ }
+ }
+
+ else if( n>=1 && n<=4 && 0==strncmp(z, "quit", n) ){
+ rc = 1;
+ }
+
+ else if( n>=2 && n<=7 && 0==strncmp(z, "repeats", n) ){
+ if( nArg ){
+ p->nRepeat = strtol(zArg, 0, 0);
+ }
+ rc = send_message(p, "ok (repeat=%d)\n", p->nRepeat);
+ }
+
+ else if( n>=2 && n<=3 && 0==strncmp(z, "run", n) ){
+ int i, j;
+ int nBusy = 0;
+ sqlite3_int64 t0 = get_timer();
+ sqlite3_int64 t1 = t0;
+ int nT1 = 0;
+ int nTBusy1 = 0;
+
+ for(j=0; (p->nRepeat<=0 || j<p->nRepeat) && rc==SQLITE_OK; j++){
+ sqlite3_int64 t2;
+
+ for(i=0; i<p->nPrepare && rc==SQLITE_OK; i++){
+ sqlite3_stmt *pStmt = p->apPrepare[i];
+
+ /* Execute the statement */
+ while( sqlite3_step(pStmt)==SQLITE_ROW );
+ rc = sqlite3_reset(pStmt);
+
+ if( (rc & 0xFF)==SQLITE_BUSY ){
+ if( sqlite3_get_autocommit(p->db)==0 ){
+ sqlite3_exec(p->db, "ROLLBACK", 0, 0, 0);
+ }
+ nBusy++;
+ rc = SQLITE_OK;
+ break;
+ }
+ else if( rc!=SQLITE_OK ){
+ send_message(p, "error - %s\n", sqlite3_errmsg(p->db));
+ }
+ }
+
+ t2 = get_timer();
+ if( t2>=(t1+1000) ){
+ int nMs = (t2 - t1);
+ int nDone = (j+1 - nBusy - nT1);
+
+ rc = send_message(
+ p, "(%d done @ %d per second, %d busy)\n",
+ nDone, (1000*nDone + nMs/2) / nMs, nBusy - nTBusy1
+ );
+ t1 = t2;
+ nT1 = j+1 - nBusy;
+ nTBusy1 = nBusy;
+ if( p->nSecond>=0 && (p->nSecond*1000)<=t1-t0 ) break;
+ }
+ }
+
+ if( rc==SQLITE_OK ){
+ send_message(p, "ok (%d/%d SQLITE_BUSY)\n", nBusy, j);
+ }
+ }
+
+ else if( n>=1 && n<=7 && 0==strncmp(z, "seconds", n) ){
+ if( nArg ){
+ p->nSecond = strtol(zArg, 0, 0);
+ if( p->nSecond>0 ) p->nRepeat = 0;
+ }
+ rc = send_message(p, "ok (repeat=%d)\n", p->nRepeat);
+ }
+
+ else{
+ send_message(p,
+ "unrecognized dot command: %.*s\n"
+ "should be \"list\", \"run\", \"repeats\", or \"seconds\"\n", n, z
+ );
+ rc = 1;
+ }
+
+ return rc;
+}
+
+static void *handle_client(void *pArg){
+ char zCmd[32*1024]; /* Read buffer */
+ int nCmd = 0; /* Valid bytes in zCmd[] */
+ int res; /* Result of read() call */
+ int rc = SQLITE_OK;
+
+ ClientCtx ctx;
+ memset(&ctx, 0, sizeof(ClientCtx));
+
+ ctx.fd = (int)(intptr_t)pArg;
+ ctx.nRepeat = 1;
+ rc = sqlite3_open(zDatabaseName, &ctx.db);
+ if( rc!=SQLITE_OK ){
+ fprintf(stderr, "sqlite3_open(): %s\n", sqlite3_errmsg(ctx.db));
+ return 0;
+ }
+
+ while( rc==SQLITE_OK ){
+ int i;
+ int iStart;
+ int nConsume;
+ int bQuote = 0;
+ res = read(ctx.fd, &zCmd[nCmd], sizeof(zCmd)-nCmd-1);
+ if( res<=0 ) break;
+ nCmd += res;
+ if( nCmd>=sizeof(zCmd)-1 ){
+ fprintf(stderr, "oversized (>32KiB) message\n");
+ res = 0;
+ break;
+ }
+ zCmd[nCmd] = '\0';
+
+ do {
+ nConsume = 0;
+
+ /* Gobble up any whitespace */
+ iStart = 0;
+ while( is_whitespace(zCmd[iStart]) ) iStart++;
+
+ if( zCmd[iStart]=='.' ){
+ /* This is a dot-command. Search for end-of-line. */
+ for(i=iStart; i<nCmd; i++){
+ if( is_eol(zCmd[i]) ){
+ rc = handle_dot_command(&ctx, &zCmd[iStart], i-iStart);
+ nConsume = i+1;
+ break;
+ }
+ }
+ }else{
+
+ int iSemi;
+ char c = 0;
+ for(iSemi=iStart; iSemi<nCmd; iSemi++){
+ if( zCmd[iSemi]==';' ){
+ c = zCmd[iSemi+1];
+ zCmd[iSemi+1] = '\0';
+ break;
+ }
+ }
+
+ if( iSemi<nCmd ){
+ if( sqlite3_complete(zCmd) ){
+ rc = handle_some_sql(&ctx, zCmd, iSemi+1);
+ nConsume = iSemi+1;
+ }
+
+ if( c ){
+ zCmd[iSemi+1] = c;
+ }
+ }
+ }
+
+ if( nConsume>0 ){
+ nCmd = nCmd-nConsume;
+ if( nCmd>0 ){
+ memmove(zCmd, &zCmd[nConsume], nCmd);
+ }
+ }
+ }while( rc==SQLITE_OK && nConsume>0 );
+ }
+
+ fprintf(stdout, "Client %d disconnects\n", ctx.fd);
+ close(ctx.fd);
+ sqlite3_close(ctx.db);
+ return 0;
+}
+
+int main(int argc, char *argv[]) {
+ sqlite3 *db;
+ int sfd;
+ int rc;
+ int yes = 1;
+ struct sockaddr_in server;
+ struct sockaddr_in client;
+
+ /* Ignore SIGPIPE. Otherwise the server exits if a client disconnects
+ ** abruptly. */
+ signal(SIGPIPE, SIG_IGN);
+
+ if( argc!=2 ){
+ fprintf(stderr, "Usage: %s DATABASE\n", argv[0]);
+ return 1;
+ }
+ zDatabaseName = argv[1];
+
+ rc = sqlite3_open(zDatabaseName, &db);
+ if( rc!=SQLITE_OK ){
+ fprintf(stderr, "sqlite3_open(): %s\n", sqlite3_errmsg(db));
+ return 1;
+ }
+
+ rc = sqlite3_exec(db, "SELECT * FROM sqlite_master", 0, 0, 0);
+ if( rc!=SQLITE_OK ){
+ fprintf(stderr, "sqlite3_exec(): %s\n", sqlite3_errmsg(db));
+ return 1;
+ }
+
+ sfd = socket(AF_INET, SOCK_STREAM, 0);
+ if( sfd<0 ){
+ fprintf(stderr, "socket() failed\n");
+ return 1;
+ }
+
+ rc = setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &yes, sizeof(yes));
+ if( rc<0 ){
+ perror("setsockopt");
+ return 1;
+ }
+
+ memset(&server, 0, sizeof(server));
+ server.sin_family = AF_INET;
+ server.sin_addr.s_addr = inet_addr("127.0.0.1");
+ server.sin_port = htons(TSERVER_PORTNUMBER);
+
+ rc = bind(sfd, (struct sockaddr *)&server, sizeof(struct sockaddr));
+ if( rc<0 ){
+ fprintf(stderr, "bind() failed\n");
+ return 1;
+ }
+
+ rc = listen(sfd, 8);
+ if( rc<0 ){
+ fprintf(stderr, "listen() failed\n");
+ return 1;
+ }
+
+ while( 1 ){
+ pthread_t tid;
+ int cfd = accept(sfd, NULL, NULL);
+ if( cfd<0 ){
+ perror("accept()");
+ return 1;
+ }
+
+ fprintf(stdout, "Client %d connects\n", cfd);
+ rc = pthread_create(&tid, NULL, handle_client, (void*)(intptr_t)cfd);
+ if( rc!=0 ){
+ perror("pthread_create()");
+ return 1;
+ }
+
+ pthread_detach(tid);
+ }
+
+ return 0;
+}
projects / thirdparty / sqlite.git / commitdiff
