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mfapi - an API set for using shared memory
API declaration:
int mfopen(MFILE* mfp, char* pathname, int size);
int mfclose(MFILE* mfp);
int mflock(MFILE* mfp);
int mfunlock(MFILE* mfp);
int mftrylock(MFILE* mfp);
void mfreset(MFILE* mfp);
void* mfpoint(MFILE* mfp); /* get mf pointed memory */
One Example:
#include "mfapi.h"
int main(int argc, char** argv)
{
MFILE mf;
int ret;
setbuf(stdout,NULL);
mfopen(&mf,"test",1024);
mfdump(&mf);
printf("this operation %s lock\n",mftrylock(&mf) ? "will" : "will not");
mflock(&mf);
int* val = (int*) mfpoint(&mf);
printf("val[%d]\n",*val);
if(argc == 2)
sleep(atoi(argv[1]));
*val = time(NULL);
printf("val[%d]\n",*val);
mfdump(&mf);
mfunlock(&mf);
#if (0000)
mfreset(&mf);
mfclose(&mf);
#endif
}
Attachment | Size |
---|---|
mfapi-20080502a-normal-backup.tgz | 1.48 KB |
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