/*----------------------------------------------------------------------------------------------
* 函数: UnloadBmp()
* 说明: 释放BMP文件所占的XMS内存块, 并对应设置BMPINFO结构
* 输入: bmpinfo BMPINFO对象指针
**--------------------------------------------------------------------------------------------*/
BOOLEAN apical UnloadBmp(BMPINFO * bmpinfo)
{
FamesAssert(bmpinfo);
if(!bmpinfo){
return fail;
}
if(bmpinfo->ready!=FAMES_BMP_READY_YES){
return fail;
}
if(bmpinfo->handle==0){
return fail;
}
lock_kernel();
XMSfree(bmpinfo->handle);
InitBMPINFO(bmpinfo);
unlock_kernel();
return ok;
}
static void
CloseXMS (void)
{
XMSfree (Handle);
}
int main(void)
{
int i;
unsigned int handle1, handle2; /* XMS handles */
char *buf1, *buf2;
if ((i = XMSinit()) == 0)
{
printf("Extended Memory Manager not found, terminating program\n");
return 1;
}
i = XMSversion();
printf("Extended Memory Manager Version %d.%d is installed\n",
i >> 8, (i & 0xff));
printf("There are %ld extended memory bytes available\n", XMScoreleft());
buf1 = malloc(BufSize);
buf2 = malloc(BufSize);
if (buf1 == NULL || buf2 == NULL)
{
printf("Error allocating conventional memory\n");
return 1;
}
for (i = 0; i < BufSize; i++) /* Fill buf1 with some values */
{
buf1[i] = i % 255;
buf2[i] = 0;
}
handle1 = XMSalloc(BlockSize);
if (handle1 == 0)
{
printf("Error allocating XMS memory for handle 1\n");
return 1;
}
printf("Handle 1 is %u and represents %ld bytes\n", handle1, BlockSize);
printf("There are %ld extended memory bytes available\n", XMScoreleft());
handle2 = XMSalloc(BlockSize);
if (handle2 == 0)
{
XMSfree(handle1);
printf("Error allocating XMS memory for handle 2\n");
return 1;
}
printf("Handle 2 is %u and represents %ld bytes\n", handle2, BlockSize);
printf("There are %ld extended memory bytes available\n", XMScoreleft());
/* Copy data from DOS buf1 to XMS memory of handle1 */
if (DOStoXMSmove(handle1, 0L, buf1, (long) BufSize) != BufSize)
printf("DOStoXMS copy failed\n");
/* Copy XMS handle1 data to XMS handle2 */
if (XMSmemcpy(handle2, 0L, handle1, 0L, BlockSize) != BlockSize)
printf("XMS copy failed\n");
/* Copy XMS handle2 data to DOS buf2 */
if (XMStoDOSmove(buf2, handle1, 0L, (long) BufSize) != BufSize)
printf("XMStoDOS copy failed\n");
/* buf1 data should now == buf2 data */
for (i = 0; i < BufSize; i++)
{
if (buf1[i] != buf2[i])
{
printf("*** ERROR: Mismatch in DOS buffers at "
"location %d ***\n", i);
break;
}
}
free(buf1);
free(buf2);
XMSfree(handle2);
printf("There are %ld bytes available after freeing handle 2\n",
XMScoreleft());
XMSfree(handle1);
printf("There are %ld bytes available after freeing handle 1\n",
XMScoreleft());
return 0;
}
void CloseXMSCache(void)
{
XMSfree(XMSHandle);
}
