/* cygserver_ipc.h
- Copyright 2002 Red Hat, Inc.
-
- Originally written by Conrad Scott <conrad.scott@dsl.pipex.com>
+ Copyright 2002, 2003, 2004 Red Hat, Inc.
This file is part of Cygwin.
#ifndef __CYGSERVER_IPC_H__
#define __CYGSERVER_IPC_H__
-#include <assert.h>
-#include <limits.h> /* For OPEN_MAX. */
-
/*
- * The sysv ipc id's (msgid, semid, shmid) are integers arranged such
- * that they no subsystem will generate the same id as some other
- * subsystem; nor do these ids overlap file descriptors (the other
- * common integer ids). Since Cygwin can allocate more than OPEN_MAX
- * file descriptors, it can't be guaranteed not to overlap, but it
- * should help catch some errors.
- *
- * msgid's: OPEN_MAX, OPEN_MAX + 3, OPEN_MAX + 6, . . .
- * semid's: OPEN_MAX + 1, OPEN_MAX + 4, OPEN_MAX + 7, . . .
- * shmid's: OPEN_MAX + 2, OPEN_MAX + 5, OPEN_MAX + 8, . . .
- *
- * To further ensure that ids are unique, if ipc objects are created
- * and destroyed and then re-created, they are given new ids by
- * munging the basic id (as above) with a sequence number.
- *
- * Internal ipc id's, which are 0, 1, ... within each subsystem (and
- * not munged with a sequence number), are used solely by the ipcs(8)
- * interface.
+ * Datastructure which is part of any IPC input parameter block.
*/
-
-enum ipc_subsys_t
- {
- IPC_MSGOP = 0,
- IPC_SEMOP = 1,
- IPC_SHMOP = 2,
- IPC_SUBSYS_COUNT
+struct vmspace {
+ void *vm_map; /* UNUSED */
+ struct shmmap_state *vm_shm;
+};
+
+struct proc {
+ pid_t cygpid;
+ DWORD winpid;
+ __uid32_t uid;
+ __gid32_t gid;
+ int gidcnt;
+ __gid32_t *gidlist;
+ bool is_admin;
+ struct vmspace *p_vmspace;
+ HANDLE signal_arrived;
+};
+
+#ifdef __INSIDE_CYGWIN__
+inline void
+ipc_set_proc_info (proc &blk)
+{
+ blk.cygpid = getpid ();
+ blk.winpid = GetCurrentProcessId ();
+ blk.uid = geteuid32 ();
+ blk.gid = getegid32 ();
+ blk.gidcnt = 0;
+ blk.gidlist = NULL;
+ blk.is_admin = false;
+ blk.signal_arrived = signal_arrived;
+}
+#endif /* __INSIDE_CYGWIN__ */
+
+#ifndef __INSIDE_CYGWIN__
+class ipc_retval {
+private:
+ union {
+ int i;
+ unsigned int u;
+ vm_offset_t off;
+ vm_object_t obj;
};
-/*
- * IPCMNI - The absolute maximum number of simultaneous ipc ids for
- * any one subsystem.
- */
+public:
+ ipc_retval (int ni) { i = ni; }
-enum
- {
- IPCMNI = 0x10000 // Must be a power of two.
- };
+ operator int () const { return i; }
+ int operator = (int ni) { return i = ni; }
-inline int
-ipc_int2ext (const int intid, const ipc_subsys_t subsys, long & sequence)
-{
- assert (0 <= intid && intid < IPCMNI);
+ operator unsigned int () const { return u; }
+ unsigned int operator = (unsigned int nu) { return u = nu; }
- const long tmp = InterlockedIncrement (&sequence);
+ operator vm_offset_t () const { return off; }
+ vm_offset_t operator = (vm_offset_t noff) { return off = noff; }
- return (((tmp & 0x7fff) << 16)
- | (OPEN_MAX + (intid * IPC_SUBSYS_COUNT) + subsys));
-}
+ operator vm_object_t () const { return obj; }
+ vm_object_t operator = (vm_object_t nobj) { return obj = nobj; }
+};
-inline int
-ipc_ext2int_subsys (const int extid)
-{
- return ((extid & (IPCMNI - 1)) - OPEN_MAX) % IPC_SUBSYS_COUNT;
-}
-
-inline int
-ipc_ext2int (const int extid, const ipc_subsys_t subsys)
-{
- if (ipc_ext2int_subsys (extid) != subsys)
- return -1;
- else
- return ((extid & (IPCMNI - 1)) - OPEN_MAX) / IPC_SUBSYS_COUNT;
-}
+struct thread {
+ class process *client;
+ proc *ipcblk;
+ ipc_retval td_retval[2];
+};
+#define td_proc ipcblk
+#define p_pid cygpid
+#endif
#endif /* __CYGSERVER_IPC_H__ */
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