merge from trunk

1 files changed, 147 insertions, 0 deletions

diff --git a/winsup/cygwin/cygserver_shm.h b/winsup/cygwin/cygserver_shm.h
new file mode 100644
index 00000000000..5a5ee38207e
--- /dev/null
+++ b/winsup/cygwin/cygserver_shm.h
@@ -0,0 +1,147 @@
+/* cygserver_shm.h: Single unix specification IPC interface for Cygwin.
+
+   Copyright 2002 Red Hat, Inc.
+
+   Written by Conrad Scott <conrad.scott@dsl.pipex.com>.
+   Based on code by Robert Collins <robert.collins@hotmail.com>.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+#ifndef __CYGSERVER_SHM_H__
+#define __CYGSERVER_SHM_H__
+
+#include <sys/types.h>
+#include <cygwin/shm.h>
+
+#include <assert.h>
+#include <limits.h>
+
+#include "cygserver_ipc.h"
+
+#include "cygwin/cygserver.h"
+
+/*---------------------------------------------------------------------------*
+ * Values for the shminfo entries.
+ *
+ * Nb. The values are segregated between two enums so that the `small'
+ * values aren't promoted to `unsigned long' equivalents.
+ *---------------------------------------------------------------------------*/
+
+enum
+  {
+    SHMMAX = ULONG_MAX,
+    SHMSEG = ULONG_MAX,
+    SHMALL = ULONG_MAX
+  };
+
+enum
+  {
+    SHMMIN = 1,
+    SHMMNI = IPCMNI		// Must be <= IPCMNI.
+  };
+
+/*---------------------------------------------------------------------------*
+ * class client_request_shm
+ *---------------------------------------------------------------------------*/
+
+#ifndef __INSIDE_CYGWIN__
+class transport_layer_base;
+class process_cache;
+#endif
+
+class client_request_shm : public client_request
+{
+  friend class client_request;
+
+public:
+  enum shmop_t
+    {
+      SHMOP_shmat,
+      SHMOP_shmctl,
+      SHMOP_shmdt,
+      SHMOP_shmget
+    };
+
+#ifdef __INSIDE_CYGWIN__
+  client_request_shm (int shmid, int shmflg); // shmat
+  client_request_shm (int shmid, int cmd, const struct shmid_ds *); // shmctl
+  client_request_shm (int shmid); // shmdt
+  client_request_shm (key_t, size_t, int shmflg); // shmget
+#endif
+
+  // Accessors for out parameters.
+
+  int shmid () const
+  {
+    assert (!error_code ());
+    return _parameters.out.shmid;
+  }
+
+  HANDLE hFileMap () const
+  {
+    assert (!error_code ());
+    return _parameters.out.hFileMap;
+  }
+
+  const struct shmid_ds & ds () const
+  {
+    assert (!error_code ());
+    return _parameters.out.ds;
+  }
+
+  const struct shminfo & shminfo () const
+  {
+    assert (!error_code ());
+    return _parameters.out.shminfo;
+  }
+
+  const struct shm_info & shm_info () const
+  {
+    assert (!error_code ());
+    return _parameters.out.shm_info;
+  }
+
+private:
+  union
+  {
+    struct
+    {
+      shmop_t shmop;
+      key_t key;
+      size_t size;
+      int shmflg;
+      int shmid;
+      int cmd;
+      pid_t cygpid;
+      DWORD winpid;
+      __uid32_t uid;
+      __gid32_t gid;
+      struct shmid_ds ds;
+    } in;
+
+    struct {
+      int shmid;
+      union
+      {
+	HANDLE hFileMap;
+	struct shmid_ds ds;
+	struct shminfo shminfo;
+	struct shm_info shm_info;
+      };
+    } out;
+  } _parameters;
+
+#ifndef __INSIDE_CYGWIN__
+  client_request_shm ();
+#endif
+
+#ifndef __INSIDE_CYGWIN__
+  virtual void serve (transport_layer_base *, process_cache *);
+#endif
+};
+
+#endif /* __CYGSERVER_SHM_H__ */