xnu-1699.22.81.tar.gz

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

diff --git a/bsd/sys/shm.h b/bsd/sys/shm.h
index e6287f0697e8ba985076df1bb7aa589fa31d0082..e7a3a4b5888e4e4f4a6af014bb74c5f552c96a27 100644 (file)
--- a/bsd/sys/shm.h
+++ b/bsd/sys/shm.h
@@ -127,13 +127,15 @@ typedef unsigned short    shmatt_t;
 #define SHM_R       (IPC_R)
 #define SHM_W       (IPC_W)
 
+#pragma pack(4)
+
 /*
  * Technically, we should force all code references to the new structure
  * definition, not in just the standards conformance case, and leave the
  * 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)
 /*
  * Structure used internally.
  * 
@@ -141,44 +143,51 @@ typedef unsigned short    shmatt_t;
  * the third argment to shmctl().
  *
  * NOTE:       The field shm_internal is not meaningful in user space,
- *             and mst not be used there.
+ *             and must not be used there.
  */
-struct __shmid_ds_new {
+#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
+struct shmid_ds
+#else
+#define        shmid_ds        __shmid_ds_new
+struct __shmid_ds_new
+#endif
+{
        struct __ipc_perm_new shm_perm; /* [XSI] Operation permission value */
        size_t          shm_segsz;      /* [XSI] Size of segment in bytes */
        pid_t           shm_lpid;       /* [XSI] PID of last shared memory op */
        pid_t           shm_cpid;       /* [XSI] PID of creator */
-       short           shm_nattch;     /* [XSI] Number of current attaches */
+       shmatt_t        shm_nattch;     /* [XSI] Number of current attaches */
        time_t          shm_atime;      /* [XSI] Time of last shmat() */
        time_t          shm_dtime;      /* [XSI] Time of last shmdt() */
        time_t          shm_ctime;      /* [XSI] Time of last shmctl() change */
        void            *shm_internal;  /* reserved for kernel use */
 };
-#define        shmid_ds        __shmid_ds_new
-#else  /* !_POSIX_C_SOURCE */
+#else  /* !__DARWIN_UNIX03 */
 #define        shmid_ds        __shmid_ds_old
-#endif /* !_POSIX_C_SOURCE */
+#endif /* !__DARWIN_UNIX03 */
 
-#if !defined(__POSIX_C_SOURCE) && !defined(__LP64__)
+#if !__DARWIN_UNIX03
 struct __shmid_ds_old {
        struct __ipc_perm_old shm_perm; /* [XSI] Operation permission value */
        size_t          shm_segsz;      /* [XSI] Size of segment in bytes */
        pid_t           shm_lpid;       /* [XSI] PID of last shared memory op */
        pid_t           shm_cpid;       /* [XSI] PID of creator */
-       short           shm_nattch;     /* [XSI] Number of current attaches */
+       shmatt_t        shm_nattch;     /* [XSI] Number of current attaches */
        time_t          shm_atime;      /* [XSI] Time of last shmat() */
        time_t          shm_dtime;      /* [XSI] Time of last shmdt() */
        time_t          shm_ctime;      /* [XSI] Time of last shmctl() change */
        void            *shm_internal;  /* reserved for kernel use */
 };
-#endif /* !_POSIX_C_SOURCE */
+#endif /* !__DARWIN_UNIX03 */
+
+#pragma pack()
 
 #ifndef KERNEL
 
 __BEGIN_DECLS
-#ifndef _POSIX_C_SOURCE
+#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 int    shmsys(int, ...);
-#endif /* !_POSIX_C_SOURCE */
+#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 void   *shmat (int, const void *, int);
 int    shmctl(int, int, struct shmid_ds *) __DARWIN_ALIAS(shmctl);
 int    shmdt(const void *);