1 files changed, 62 insertions, 57 deletions

diff --git a/winsup/cygwin/include/cygwin/shm.h b/winsup/cygwin/include/cygwin/shm.h
index eb037ba19..b6b2d447c 100644
--- a/winsup/cygwin/include/cygwin/shm.h
+++ b/winsup/cygwin/include/cygwin/shm.h
@@ -1,6 +1,6 @@
 /* sys/shm.h
 
-   Copyright 2001 Red Hat Inc. 
+   Copyright 2001, 2002 Red Hat Inc.
    Written by Robert Collins <rbtcollins@hotmail.com>
 
 This file is part of Cygwin.
@@ -9,81 +9,86 @@ This software is a copyrighted work licensed under the terms of the
 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
 details. */
 
+#ifndef _SYS_SHM_H
+#define _SYS_SHM_H
+
+#include <cygwin/ipc.h>
+
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
-#ifndef _SYS_SHM_H
-#define _SYS_SHM_H
-
-#include <cygwin/ipc.h>
+/* 64 Kb was hardcoded for x86. MS states this may change, but we need
+ * it in the header file.
+ */
+#define SHMLBA 65536		/* Segment low boundary address multiple. */
 
-#define SHM_RDONLY 1
-/* 64 Kb was hardcoded for x86. MS states this may change, but we need it in the header
- * file.
+/* Shared memory operation flags:
  */
-#define SHMLBA     65536
-#define SHM_RND	   1
+#define SHM_RDONLY 0x01		/* Attach read-only (else read-write). */
+#define SHM_RND    0x02		/* Round attach address to SHMLBA. */
 
-typedef long int shmatt_t;
+/* Command definitions for the semctl () function:
+ */
+#define SHM_STAT   0x4000	/* For ipcs(8) */
+#define SHM_INFO   0x4001	/* For ipcs(8) */
 
-#if defined(__INSIDE_CYGWIN__) && defined(__cplusplus)
+/* Unsigned integer used for the number of current attaches.
+ */
+typedef unsigned int shmatt_t;
 
-class _shmattach {
-public:
-  void *data;
-  int shmflg;
-  class _shmattach *next;
+struct shmid_ds
+{
+  struct ipc_perm shm_perm;	/* Operation permission structure. */
+  size_t          shm_segsz;	/* Size of segment in bytes. */
+  pid_t           shm_lpid;	/* Process ID of last operation. */
+  pid_t           shm_cpid;	/* Process ID of creator. */
+  shmatt_t        shm_nattch;	/* Number of current attaches. */
+  timestruc_t     shm_atim;	/* Time of last shmat (). */
+  timestruc_t     shm_dtim;	/* Time of last shmdt (). */
+  timestruc_t     shm_ctim;	/* Time of last change by shmctl (). */
+  long            shm_spare4[2];
 };
 
-class shmid_ds {
-public:
-  struct   ipc_perm shm_perm;
-  size_t   shm_segsz;
-  pid_t    shm_lpid;
-  pid_t    shm_cpid;
-  shmatt_t shm_nattch;
-  time_t   shm_atime;
-  time_t   shm_dtime;
-  time_t   shm_ctime;
-  void *mapptr;
-};
+#define shm_atime shm_atim.tv_sec
+#define shm_dtime shm_dtim.tv_sec
+#define shm_ctime shm_ctim.tv_sec
 
-class shmnode {
-public:
-  class shmid_ds * shmds;
-  int shm_id;
-  class shmnode *next;
-  key_t key;
-  HANDLE filemap;
-  HANDLE attachmap;
-  class _shmattach *attachhead;
+/* Buffer type for shmctl (IPC_INFO, ...) as used by ipcs(8).
+ */
+struct shminfo
+{
+  unsigned long shmmax;		/* Maximum size in bytes of a shared
+				   memory segment. */
+  unsigned long shmmin;		/* Minimum size in bytes of a shared
+				   memory segment. */
+  unsigned long shmmni;		/* Maximum number of shared memory
+				   segments, system wide. */
+  unsigned long shmseg;		/* Maximum number of shared memory
+				   segments attached per process. */
+  unsigned long shmall;		/* Maximum number of bytes of shared
+				   memory, system wide. */
+  unsigned long shm_spare[4];
 };
 
-#else
-/* this is what we return when queried. It has no bitwise correspondence
- * the internal structures 
+/* Buffer type for shmctl (SHM_INFO, ...) as used by ipcs(8).
  */
-struct shmid_ds {
-  struct   ipc_perm shm_perm;
-  size_t   shm_segsz;
-  pid_t    shm_lpid;
-  pid_t    shm_cpid;
-  shmatt_t shm_nattch;
-  time_t   shm_atime;
-  time_t   shm_dtime;
-  time_t   shm_ctime;
+struct shm_info
+{
+  unsigned long shm_ids;	/* Number of allocated segments. */
+  unsigned long shm_tot;	/* Size in bytes of allocated segments. */
+  unsigned long shm_atts;	/* Number of attached segments, system
+				   wide. */
 };
-#endif /* __INSIDE_CYGWIN__ */
-
-void *shmat(int, const void *, int);
-int   shmctl(int, int, struct shmid_ds *);
-int   shmdt(const void *);
-int   shmget(key_t, size_t, int);
 
-#endif /* _SYS_SHM_H */
+void *shmat (int shmid, const void *shmaddr, int shmflg);
+int   shmctl (int shmid, int cmd, struct shmid_ds *buf);
+int   shmdt (const void *shmaddr);
+int   shmget (key_t key, size_t size, int shmflg);
 
 #ifdef __cplusplus
 }
 #endif
+
+#endif /* _SYS_SHM_H */