xnu-4903.270.47.tar.gz

[apple/xnu.git] / bsd / sys / sem.h

diff --git a/bsd/sys/sem.h b/bsd/sys/sem.h
index fbb1b4f564859993f406825191db7e00737805eb..44fafe8916330abc24bd0e5064f601f7870e459e 100644 (file)
--- a/bsd/sys/sem.h
+++ b/bsd/sys/sem.h
@@ -1,31 +1,29 @@
 /*
 /*

- * Copyright (c) 2006 Apple Computer, Inc. All Rights Reserved.
- * 
- * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code 
- * as defined in and that are subject to the Apple Public Source License 
- * Version 2.0 (the 'License'). You may not use this file except in 
- * compliance with the License.  The rights granted to you under the 
- * License may not be used to create, or enable the creation or 
- * redistribution of, unlawful or unlicensed copies of an Apple operating 
- * system, or to circumvent, violate, or enable the circumvention or 
- * violation of, any terms of an Apple operating system software license 
- * agreement.
+ * Copyright (c) 2000-2007 Apple Inc. All rights reserved.

  *
  *

- * Please obtain a copy of the License at 
- * http://www.opensource.apple.com/apsl/ and read it before using this 
- * file.
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

  *
  *

- * The Original Code and all software distributed under the License are 
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
- * Please see the License for the specific language governing rights and 
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and

  * limitations under the License.
  *
  * limitations under the License.
  *

- * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@

  */
 /*     $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $      */
 
  */
 /*     $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $      */
 


@@ -42,6 +40,7 @@
 
 #include <sys/cdefs.h>
 #include <sys/_types.h>
 
 #include <sys/cdefs.h>
 #include <sys/_types.h>

+#include <machine/types.h> /* __int32_t */

 
 /*
  * [XSI]       All of the symbols from <sys/ipc.h> SHALL be defined
 
 /*
  * [XSI]       All of the symbols from <sys/ipc.h> SHALL be defined


@@ -57,20 +56,9 @@
  * NOTE:       The definition of the key_t type is implicit from the
  *             inclusion of <sys/ipc.h>
  */
  * NOTE:       The definition of the key_t type is implicit from the
  *             inclusion of <sys/ipc.h>
  */

-#ifndef _PID_T
-typedef __darwin_pid_t pid_t;
-#define _PID_T
-#endif
-
-#ifndef        _TIME_T
-#define        _TIME_T
-typedef        __darwin_time_t time_t;
-#endif
-
-#ifndef _SIZE_T
-#define _SIZE_T
-typedef __darwin_size_t        size_t;
-#endif
+#include <sys/_types/_pid_t.h>
+#include <sys/_types/_time_t.h>
+#include <sys/_types/_size_t.h>

 
 /*
  * Technically, we should force all code references to the new structure
 
 /*
  * Technically, we should force all code references to the new structure


@@ -78,10 +66,11 @@ typedef __darwin_size_t     size_t;
  * legacy interface there for binary compatibility only.  Currently, we
  * are only forcing this for programs requesting standards conformance.
  */
  * legacy interface there for binary compatibility only.  Currently, we
  * are only forcing this for programs requesting standards conformance.
  */

-#if defined(__POSIX_C_SOURCE) || defined(kernel) || defined(__LP64__)
+#if __DARWIN_UNIX03 || defined(KERNEL)
+#pragma pack(4)

 /*
  * Structure used internally.
 /*
  * Structure used internally.

- * 
+ *

  * This structure is exposed because standards dictate that it is used as
  * the semun union member 'buf' as the fourth argment to semctl() when the
  * third argument is IPC_STAT or IPC_SET.
  * This structure is exposed because standards dictate that it is used as
  * the semun union member 'buf' as the fourth argment to semctl() when the
  * third argument is IPC_STAT or IPC_SET.


@@ -89,56 +78,62 @@ typedef __darwin_size_t     size_t;
  * Note: only the fields sem_perm, sem_nsems, sem_otime, and sem_ctime
  * are meaningful in user space.
  */
  * Note: only the fields sem_perm, sem_nsems, sem_otime, and sem_ctime
  * are meaningful in user space.
  */

-struct __semid_ds_new {
-       struct __ipc_perm_new sem_perm; /* [XSI] operation permission struct */
-       __int32_t       sem_base;       /* 32 bit base ptr for semaphore set */
-       unsigned short  sem_nsems;      /* [XSI] number of sems in set */
-       time_t          sem_otime;      /* [XSI] last operation time */
-       __int32_t       sem_pad1;       /* RESERVED: DO NOT USE! */
-       time_t          sem_ctime;      /* [XSI] last change time */
-                                       /* Times measured in secs since */
-                                       /* 00:00:00 GMT, Jan. 1, 1970 */
-       __int32_t       sem_pad2;       /* RESERVED: DO NOT USE! */
-       __int32_t       sem_pad3[4];    /* RESERVED: DO NOT USE! */
+#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
+struct semid_ds
+#else
+#define semid_ds        __semid_ds_new
+struct __semid_ds_new
+#endif
+{
+       struct __ipc_perm_new sem_perm; /* [XSI] operation permission struct */
+       __int32_t       sem_base;       /* 32 bit base ptr for semaphore set */
+       unsigned short  sem_nsems;      /* [XSI] number of sems in set */
+       time_t          sem_otime;      /* [XSI] last operation time */
+       __int32_t       sem_pad1;       /* RESERVED: DO NOT USE! */
+       time_t          sem_ctime;      /* [XSI] last change time */
+                                       /* Times measured in secs since */
+                                       /* 00:00:00 GMT, Jan. 1, 1970 */
+       __int32_t       sem_pad2;       /* RESERVED: DO NOT USE! */
+       __int32_t       sem_pad3[4];    /* RESERVED: DO NOT USE! */

 };
 };

-#define        semid_ds        __semid_ds_new
-#else  /* !_POSIX_C_SOURCE */
-#define        semid_ds        __semid_ds_old
-#endif /* !_POSIX_C_SOURCE */
+#pragma pack()
+#else   /* !__DARWIN_UNIX03 */
+#define semid_ds        __semid_ds_old
+#endif  /* __DARWIN_UNIX03 */

 
 

-#if !defined(__POSIX_C_SOURCE) && !defined(__LP64__)
+#if !__DARWIN_UNIX03

 struct __semid_ds_old {
 struct __semid_ds_old {

-       struct __ipc_perm_old sem_perm; /* [XSI] operation permission struct */
-       __int32_t       sem_base;       /* 32 bit base ptr for semaphore set */
-       unsigned short  sem_nsems;      /* [XSI] number of sems in set */
-       time_t          sem_otime;      /* [XSI] last operation time */
-       __int32_t       sem_pad1;       /* RESERVED: DO NOT USE! */
-       time_t          sem_ctime;      /* [XSI] last change time */
-                                       /* Times measured in secs since */
-                                       /* 00:00:00 GMT, Jan. 1, 1970 */
-       __int32_t       sem_pad2;       /* RESERVED: DO NOT USE! */
-       __int32_t       sem_pad3[4];    /* RESERVED: DO NOT USE! */
+       struct __ipc_perm_old sem_perm; /* [XSI] operation permission struct */
+       __int32_t       sem_base;       /* 32 bit base ptr for semaphore set */
+       unsigned short  sem_nsems;      /* [XSI] number of sems in set */
+       time_t          sem_otime;      /* [XSI] last operation time */
+       __int32_t       sem_pad1;       /* RESERVED: DO NOT USE! */
+       time_t          sem_ctime;      /* [XSI] last change time */
+                                       /* Times measured in secs since */
+                                       /* 00:00:00 GMT, Jan. 1, 1970 */
+       __int32_t       sem_pad2;       /* RESERVED: DO NOT USE! */
+       __int32_t       sem_pad3[4];    /* RESERVED: DO NOT USE! */

 };
 };

-#endif /* !_POSIX_C_SOURCE */
+#endif  /* !__DARWIN_UNIX03 */

 
 /*
  * Possible values for the third argument to semctl()
  */
 
 /*
  * Possible values for the third argument to semctl()
  */

-#define GETNCNT        3       /* [XSI] Return the value of semncnt {READ} */
-#define GETPID 4       /* [XSI] Return the value of sempid {READ} */
-#define GETVAL 5       /* [XSI] Return the value of semval {READ} */
-#define GETALL 6       /* [XSI] Return semvals into arg.array {READ} */
-#define GETZCNT        7       /* [XSI] Return the value of semzcnt {READ} */
-#define SETVAL 8       /* [XSI] Set the value of semval to arg.val {ALTER} */
-#define SETALL 9       /* [XSI] Set semvals from arg.array {ALTER} */
+#define GETNCNT 3       /* [XSI] Return the value of semncnt {READ} */
+#define GETPID  4       /* [XSI] Return the value of sempid {READ} */
+#define GETVAL  5       /* [XSI] Return the value of semval {READ} */
+#define GETALL  6       /* [XSI] Return semvals into arg.array {READ} */
+#define GETZCNT 7       /* [XSI] Return the value of semzcnt {READ} */
+#define SETVAL  8       /* [XSI] Set the value of semval to arg.val {ALTER} */
+#define SETALL  9       /* [XSI] Set semvals from arg.array {ALTER} */

 
 
 /* A semaphore; this is an anonymous structure, not for external use */
 struct sem {
 
 
 /* A semaphore; this is an anonymous structure, not for external use */
 struct sem {

-       unsigned short  semval;         /* semaphore value */
-       pid_t           sempid;         /* pid of last operation */
-       unsigned short  semncnt;        /* # awaiting semval > cval */
-       unsigned short  semzcnt;        /* # awaiting semval == 0 */
+       unsigned short  semval;         /* semaphore value */
+       pid_t           sempid;         /* pid of last operation */
+       unsigned short  semncnt;        /* # awaiting semval > cval */
+       unsigned short  semzcnt;        /* # awaiting semval == 0 */

 };
 
 
 };
 
 


@@ -146,33 +141,23 @@ struct sem {
  * Structure of array element for second argument to semop()
  */
 struct sembuf {
  * Structure of array element for second argument to semop()
  */
 struct sembuf {

-       unsigned short  sem_num;        /* [XSI] semaphore # */
-       short           sem_op;         /* [XSI] semaphore operation */
-       short           sem_flg;        /* [XSI] operation flags */
+       unsigned short  sem_num;        /* [XSI] semaphore # */
+       short           sem_op;         /* [XSI] semaphore operation */
+       short           sem_flg;        /* [XSI] operation flags */

 };
 
 /*
  * Possible flag values for sem_flg
  */
 };
 
 /*
  * Possible flag values for sem_flg
  */

-#define SEM_UNDO       010000          /* [XSI] Set up adjust on exit entry */
+#define SEM_UNDO        010000          /* [XSI] Set up adjust on exit entry */

 
 
 
 

-#ifndef _POSIX_C_SOURCE
-
-/*
- * System imposed limit on the value of the third parameter to semop().
- * This is arbitrary, and the standards unfortunately do not provide a
- * way for user applications to retrieve this value (e.g. via sysconf()
- * or from a manifest value in <unistd.h>).  The value shown here is
- * informational, and subject to change in future revisions.
- */
-#define MAX_SOPS       5       /* maximum # of sembuf's per semop call */
-
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)

 
 /*
  * Union used as the fourth argment to semctl() in all cases.  Specific
  * member values are used for different values of the third parameter:
 
 /*
  * Union used as the fourth argment to semctl() in all cases.  Specific
  * member values are used for different values of the third parameter:

- * 
+ *

  * Command                                     Member
  * ------------------------------------------- ------
  * GETALL, SETALL                              array
  * Command                                     Member
  * ------------------------------------------- ------
  * GETALL, SETALL                              array


@@ -181,7 +166,7 @@ struct sembuf {
  *
  * The union definition is intended to be defined by the user application
  * in conforming applications; it is provided here for two reasons:
  *
  * The union definition is intended to be defined by the user application
  * in conforming applications; it is provided here for two reasons:

- * 
+ *

  * 1)  Historical source compatability for non-conforming applications
  *     expecting this header to declare the union type on their behalf
  *
  * 1)  Historical source compatability for non-conforming applications
  *     expecting this header to declare the union type on their behalf
  *


@@ -190,9 +175,9 @@ struct sembuf {
  *     not function correctly
  */
 union semun {
  *     not function correctly
  */
 union semun {

-       int             val;            /* value for SETVAL */
-       struct semid_ds *buf;           /* buffer for IPC_STAT & IPC_SET */
-       unsigned short  *array;         /* array for GETALL & SETALL */
+       int             val;            /* value for SETVAL */
+       struct semid_ds *buf;           /* buffer for IPC_STAT & IPC_SET */
+       unsigned short  *array;         /* array for GETALL & SETALL */

 };
 typedef union semun semun_t;
 
 };
 typedef union semun semun_t;
 


@@ -200,22 +185,22 @@ typedef union semun semun_t;
 /*
  * Permissions
  */
 /*
  * Permissions
  */

-#define SEM_A          0200    /* alter permission */
-#define SEM_R          0400    /* read permission */
+#define SEM_A           0200    /* alter permission */
+#define SEM_R           0400    /* read permission */

 
 

-#endif /* !_POSIX_C_SOURCE */
+#endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */

 
 
 
 #ifndef KERNEL
 
 __BEGIN_DECLS
 
 
 
 #ifndef KERNEL
 
 __BEGIN_DECLS

-#ifndef _POSIX_C_SOURCE
-int    semsys(int, ...);
-#endif /* !_POSIX_C_SOURCE */
-int    semctl(int, int, int, ...) __DARWIN_ALIAS(semctl);
-int    semget(key_t, int, int);
-int    semop(int, struct sembuf *, size_t);
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
+int     semsys(int, ...);
+#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
+int     semctl(int, int, int, ...) __DARWIN_ALIAS(semctl);
+int     semget(key_t, int, int);
+int     semop(int, struct sembuf *, size_t);

 __END_DECLS
 
 #endif /* !KERNEL */
 __END_DECLS
 
 #endif /* !KERNEL */