New version from Adam, slightly cleaned up by me.

1994-05-25 07:38:03 +00:00 · 1994-05-25 07:38:03 +00:00 · c243e36486
commit c243e36486
parent ab0a415c77
1 changed files with 83 additions and 1 deletions
--- a/sys/sys/shm.h
+++ b/sys/sys/shm.h
@ -1 +1,83 @@
-revision 1.8 intentionally removed
+/*
+ * Copyright (c) 1994 Adam Glass
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. The name of the Author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL Adam Glass BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * As defined+described in "X/Open System Interfaces and Headers"
+ *                         Issue 4, p. XXX
+ */
+
+#ifndef _SYS_SHM_H_
+#define _SYS_SHM_H_
+
+#include <sys/ipc.h>
+
+#define SHM_RDONLY  010000  /* Attach read-only (else read-write) (origin ?)*/
+#define SHM_RND     020000  /* Round attach address to SHMLBA (origin XXX) */
+#define SHMLBA      CLBYTES /* Segment low boundry address multiple (origin, machdep XXX*/
+
+typedef u_short shmatt_t;
+
+struct shmid_ds {
+	struct ipc_perm shm_perm;	/* operation permission structure */
+	int             shm_segsz;	/* size of segment in bytes */
+	pid_t           shm_lpid;   /* process ID of last shared memory op */
+	pid_t           shm_cpid;	/* process ID of creator */
+	shmatt_t        shm_nattch;	/* number of current attaches */
+	time_t          shm_atime;	/* time of last shmat() */
+	time_t          shm_dtime;	/* time of last shmdt() */
+	time_t          shm_ctime;	/* time of last change by shmctl() */
+	void           *shm_internal;   /* sysv stupidity */
+};
+
+#ifdef KERNEL
+
+/*
+ * System 5 style catch-all structure for shared memory constants that
+ * might be of interest to user programs.  Do we really want/need this?
+ */
+struct shminfo {
+	int	shmmax,		/* max shared memory segment size (bytes) */
+		shmmin,		/* min shared memory segment size (bytes) */
+		shmmni,		/* max number of shared memory identifiers */
+		shmseg,		/* max shared memory segments per process */
+		shmall;		/* max amount of shared memory (pages) */
+};
+struct shminfo	shminfo;
+struct shmid_ds	*shmsegs;
+
+#else /* !KERNEL */
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+void *shmat __P((int, const void *, int));
+void  shmctl __P((int, int, struct shmid_ds *));
+void  shmdt __P((const void *));
+void  shmget __P((key_t, size_t, int));
+__END_DECLS
+
+#endif /* !KERNEL */
+
+#endif /* !_SYS_SHM_H_ */