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* shm.cc (shmat): Return (void *) -1 on error instead of NULL.

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This commit is contained in:
Corinna Vinschen
2004-03-28 21:01:33 +00:00
parent f241377ee1
commit 83216c72ec
2 changed files with 10 additions and 6 deletions
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4
winsup/cygwin/ChangeLog
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@@ -1,3 +1,7 @@
2004-03-28 Corinna Vinschen <corinna@vinschen.de>
* shm.cc (shmat): Return (void *) -1 on error instead of NULL.
2004-03-27 Christopher Faylor <cgf@redhat.com>
* fhandler_nodevice.cc (fhandler_nodevice::open): Assume that errno has

12
winsup/cygwin/shm.cc
View File

@@ -162,7 +162,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
{
/* Invalid shmid */
set_errno (EINVAL);
return NULL;
return (void *) -1;
}
vm_object_t attach_va = NULL;
if (shmaddr)
@@ -176,7 +176,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
if (!attach_va || (vm_offset_t)attach_va % SHMLBA)
{
set_errno (EINVAL);
return NULL;
return (void *) -1;
}
}
/* Try allocating memory before calling cygserver. */
@@ -184,7 +184,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
if (!sph_entry)
{
set_errno (ENOMEM);
return NULL;
return (void *) -1;
}
DWORD access = (shmflg & SHM_RDONLY) ? FILE_MAP_READ : FILE_MAP_WRITE;
vm_object_t ptr = MapViewOfFileEx(ssh_entry->hdl, access, 0, 0,
@@ -193,7 +193,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
{
__seterrno ();
delete sph_entry;
return NULL;
return (void *) -1;
}
/* Use returned ptr address as is, so it's stored using the exact value
in cygserver. */
@@ -206,7 +206,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
set_errno (request.error_code ());
if (request.error_code () == ENOSYS)
raise (SIGSYS);
return NULL;
return (void *) -1;
}
sph_entry->ptr = ptr;
sph_entry->hdl = ssh_entry->hdl;
@@ -217,7 +217,7 @@ shmat (int shmid, const void *shmaddr, int shmflg)
#else
set_errno (ENOSYS);
raise (SIGSYS);
return NULL;
return (void *) -1;
#endif
}