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2002-03-04 Robert Collins <rbtcollins@hotmail.com>

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* cygserver_shm.cc (client_request_shm::serve): Implement SHM_DETACH.
        * shm.cc (shmdt): Implement.
This commit is contained in:
Robert Collins 2002-03-04 08:12:53 +00:00
parent 67be0adb71
commit 038c71f10c
4 changed files with 76 additions and 2 deletions
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20
winsup/cygserver/shm.cc
View File

@ -290,6 +290,26 @@ client_request_shm::serve (transport_layer_base * conn, process_cache * cache)
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)
{

5
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,8 @@
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.

20
winsup/cygwin/cygserver_shm.cc
View File

@ -290,6 +290,26 @@ client_request_shm::serve (transport_layer_base * conn, process_cache * cache)
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)
{

33
winsup/cygwin/shm.cc
View File

@ -305,8 +305,37 @@ shmdt (const void *shmaddr)
/* 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?