main.c

eXtremeDB数据库在Linux平台下的使用源码。内含多个示例程序

/***************************************************************
 *                                                             *
 * Copyright (c) 2001-2007 McObject LLC. All Right Reserved.   *
 *                                                             *
 ***************************************************************/

/* This samples demonstartes eXtremeDB patricia tree *match functions behaviour. */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "simple.h"
#include "objfunc.h"

static const char   *   dbname = "SimpleDb";
static const int        FIRST_SEGSZ = 1024 * 8000UL;
#ifndef MCO_PLATFORM_X64
static const int        PAGESIZE = 96;
#else
static const int        PAGESIZE = 192;
#endif

const int MAP_ADDRESS =  0x20000000;

void _SH_(void) {

	char text[] = {
		"\nThis samples demonstartes eXtremeDB patricia tree *match functions behaviour.\n"
	};
	char text1[] = {
		"Copyright (c) 2001-2007 McObject LLC. All Right Reserved.\n\n"
	};

	printf("%s\neXtremeDB runtime version %d.%d, build %d\n%s\n\nPress Enter to start",
		text, MCO_COMP_VER_MAJOR, MCO_COMP_VER_MINOR, MCO_COMP_BUILD_NUM,text1);

	getchar();

}



/* fatal error handler */
static void errhandler( int n ) {
	printf( "\neXtremeDB runtime fatal error: %d", n );
	getchar();
	exit( -1 );
}

int main( void ) {
	MCO_RET     rc;
	mco_db_h    db = 0;
	char    *  start_mem;
	mco_runtime_info_t info;

	_SH_();
	mco_get_runtime_info( &info);
	if ( info.mco_shm_supported ) {
		start_mem = (char*)MAP_ADDRESS;
	}
	else {
		start_mem = (char*)malloc(FIRST_SEGSZ);
		if (!start_mem) {
			printf("Couldn't allocated memory\n");
			exit (1);
		}
	};

	/* set fatal error handler */
	mco_error_set_handler( &errhandler );

	mco_runtime_start();
	/* Create a database - allocate 2M starting from mem. */
	rc = mco_db_open( dbname, simple_get_dictionary(), start_mem, FIRST_SEGSZ, (uint2) PAGESIZE );

	if ( rc ) {
		printf( "\nerror creating database" );
		if ( !info.mco_shm_supported )
			free( start_mem );
		exit( 1 );
	}

	/* connect to the database, obtain a database handle */
	mco_db_connect( dbname, &db );
	printf( "\ndb handle = %d\n", db );


	createDatabase( db );
	doListing( db );
	doGoogle( db );

	/* disconnect from the database, db is no longer valid */
	mco_db_disconnect( db );

	/* destroy the db */
	mco_db_close( dbname );

	mco_runtime_stop();

	if ( !info.mco_shm_supported )
		free( start_mem );

	printf( "Press Enter key to exit" );
	getchar();
  exit(0);
}