* cygserver_shm.cc (client_request_shm::serve): Implement SHM_DETACH.
* shm.cc (shmdt): Implement.
return;
}
+ /* Someone detached */
+ if (parameters.in.type == SHM_DETACH)
+ {
+ shmnode *tempnode = shm_head;
+ while (tempnode)
+ {
+ if (tempnode->shm_id == parameters.in.shm_id)
+ {
+ InterlockedDecrement (&tempnode->shmds->shm_nattch);
+ header.error_code = 0;
+ CloseHandle (token_handle);
+ return;
+ }
+ tempnode = tempnode->next;
+ }
+ header.error_code = EINVAL;
+ CloseHandle (token_handle);
+ return;
+ }
+
/* Someone wants the ID removed. */
if (parameters.in.type == SHM_DEL)
{
2002-03-04 Robert Collins <rbtcollins@hotmail.com>
+ * cygserver_shm.cc (client_request_shm::serve): Implement SHM_DETACH.
+ * shm.cc (shmdt): Implement.
+
+2002-03-04 Robert Collins <rbtcollins@hotmail.com>
+
* cygserver_shm.cc: Run indent.
(deleted_head): New global for storing shm id's pending deletion.
(client_request_shm::serve): Return ENOSYS for invalid request types.
return;
}
+ /* Someone detached */
+ if (parameters.in.type == SHM_DETACH)
+ {
+ shmnode *tempnode = shm_head;
+ while (tempnode)
+ {
+ if (tempnode->shm_id == parameters.in.shm_id)
+ {
+ InterlockedDecrement (&tempnode->shmds->shm_nattch);
+ header.error_code = 0;
+ CloseHandle (token_handle);
+ return;
+ }
+ tempnode = tempnode->next;
+ }
+ header.error_code = EINVAL;
+ CloseHandle (token_handle);
+ return;
+ }
+
/* Someone wants the ID removed. */
if (parameters.in.type == SHM_DEL)
{
/* this should be "rare" so a hefty search is ok. If this is common, then we
* should alter the data structs to allow more optimisation
*/
- set_errno (ENOTSUP);
- return -1;
+ shmnode *tempnode = shm_head;
+ _shmattach *attachnode;
+ while (tempnode)
+ {
+ // FIXME: Race potential
+ attachnode = tempnode->attachhead;
+ while (attachnode && attachnode->data != shmaddr)
+ attachnode = attachnode->next;
+ if (attachnode)
+ break;
+ tempnode = tempnode->next;
+ }
+ if (!tempnode)
+ {
+ // dt cannot be called by an app that hasn't alreadu at'd
+ set_errno (EINVAL);
+ return -1;
+ }
+
+ UnmapViewOfFile (attachnode->data);
+ /* tell the daemon we have attached */
+ client_request_shm *req =
+ new client_request_shm (SHM_DETACH, tempnode->shm_id);
+ int rc;
+ if ((rc = cygserver_request (req)))
+ {
+ debug_printf ("failed to tell deaemon that we have detached\n");
+ }
+ delete req;
+
+ return 0;
}
//FIXME: who is allowed to perform STAT?