void tst_shm2(void)
{
int r;
int shmid;
syscall_wait(10);
shmid=shm_lookup(SHRMEMNAME);
display_puts("shm2 lookup=");
sint2dec(shmid,s);
display_puts(s);
r=shm_map(shmid,(void*)SHRMEMADDR);
display_puts(" shm2 map=");
sint2dec(r,s);
display_puts(s);
// display_puts("\n");
syscall_wait(50);
syscall_mtx_lock((int*)SHRMEMADDR);
memcpy(s,(void*)(SHRMEMADDR+sizeof(int)),4);
syscall_mtx_unlock((int*)SHRMEMADDR);
s[4]=0;
display_puts(" shm2 shrstr=");
display_puts(s);
// display_puts("\n");
r=shm_unmap(shmid);
display_puts(" shm2 unmap=");
sint2dec(r,s);
display_puts(s);
display_puts("\n");
}
int shm_release(const char* path) {
KASSERT(path);
shm_node_t* tmp, *t2;
if(strcmp(shm_queue->path, path) == 0) {
t2 = shm_queue;
shm_queue = shm_queue->next;
shm_unmap(t2);
pmm_free_frames(t2->physaddr, t2->size / MM_BLOCKSZ);
kfree(t2->path);
kfree(t2);
return 0;
} else {
for(tmp = shm_queue; tmp->next; tmp = tmp->next) {
t2 = tmp->next;
if(strcmp(t2->path, path) == 0) {
tmp->next = t2->next;
shm_unmap(t2);
pmm_free_frames(t2->physaddr, t2->size / MM_BLOCKSZ);
kfree(t2->path);
kfree(t2);
return 0;
}
}
}
return -1;
}
/* munmaps and unlinks the shared memory */
void shm_destroy(char *fname, void *p, size_t size)
{
shm_unmap(p, size);
if (shm_unlink(fname) == -1)
fail_en("shm_unlink");
}
int syscall_shm_unmap(int shmid, void *vmem)
{
if((unsigned long)vmem < CFG_MEM_KERNELMAX)
return ERRNO_NOTEXIST;
return shm_unmap(shmid, page_get_current_pgd(), vmem);
}
