/* @(#) ipc.h $Date: 2004/08/05 11:40:57 $Revision: i380/5 PATCH_11.23 (PHKL_31500) */ /* * (C) Copyright 1996-2004 Hewlett-Packard Development Company, LP */ /* * @(#) * Common interprocess communication (IPC) access structure definition, * used by the three IPC mechanisms: messages, semaphores and shared * memory. */ #ifndef _SYS_IPC_INCLUDED #define _SYS_IPC_INCLUDED #include #include #ifdef _INCLUDE_XOPEN_SOURCE /* Needed types and structures */ /* Common IPC Access Structure */ struct ipc_perm { # ifdef _CLASSIC_ID_TYPES unsigned short filler_uid; unsigned short uid; /* owner's user id */ unsigned short filler_gid; unsigned short gid; /* owner's group id */ unsigned short filler_cuid; unsigned short cuid; /* creator's user id */ unsigned short filler_cgid; unsigned short cgid; /* creator's group id */ # else uid_t uid; /* owner's user id */ gid_t gid; /* owner's group id */ uid_t cuid; /* creator's user id */ gid_t cgid; /* creator's group id */ # endif /* not _CLASSIC_ID_TYPES */ mode_t mode; /* access modes */ unsigned short __seq16;/* OLD slot usage sequence number */ key_t key; /* key */ unsigned short __ndx; /* NOT USED; was ndx of proc who has lock */ unsigned short __wait; /* waits, wanted, lock bits; reserved for specific ipc facilities */ unsigned int seq; /* slot usage sequence number */ # ifdef _INCLUDE_HPUX_SOURCE cid_t cid; /* Compartment ID */ # else int __cpad; /* pad for non-hp code */ # endif /* _INCLUDE_HPUX_SOURCE */ char pad[12];/* room for future expansion */ }; # define _IPCPERM_T /* * Message queue size fields have been changed from short to long. This * allows queues to now exceed old 64Kbytes limits. However, in order * to preserve compatibility, queue limits will continue to default to * 64Kbytes until a future release. If >64Kbytes is desired, programs * using a common queue can be recompiled with -D__BIGMSGQUEUE_ENABLED. * Also, the administrator must increase the appropriate kernel tunables. */ #if defined(__BIGMSGQUEUE_ENABLED) # define __IPC16_CREAT 0001000 # define IPC_CREAT 0040000 #else # define IPC_CREAT 0001000 /* create entry if key doesn't exist */ #endif # define IPC_EXCL 0002000 /* fail if key exists */ # define IPC_NOWAIT 0004000 /* error if request must wait */ # define IPC_SHARE32 0010000 /* allocate in 32-bit addr space */ /* Used for sharing with 64 bit apps.*/ # define IPC_GLOBAL 0020000 /* Create shared memory segment so * that it can be shared across memory * windows. */ /* * These flags only matter on ccNUMA machines. These flags allow the * caller to specify where physical memory comes from for the pages * mapped by a call to shmget(). For each flag, physical memory will * come from: */ # define IPC_MEM_LOCAL 0100000 /* the current locality domain */ # define IPC_MEM_INTERLEAVED 0200000 /* interleaved memory */ # define IPC_MEM_FIRST_TOUCH 0400000 /* the touching locality domain */ # define IPC_MEM_STRIPED 01000000 /* striped amongst localities HINT */ /* * This hint is used for a performance enhancement in the case where there * are many shared memory segments being accessed by a process. Setting * this hint "may" reuse protection id across all shared memory segments * created by the process using this hint. */ # define IPC_RELAXED_ISOLATION 02000000 /* Keys. */ # define IPC_PRIVATE (key_t)0 /* private key */ /* Control Commands. */ # define IPC_RMID 0 /* remove identifier */ #ifdef _KERNEL # define __IPC16_SET 1 /* pre-11.11 "ds" struct */ #endif # define IPC_SET 11 /* set options */ # define IPC_STAT 2 /* get options */ #endif /* _INCLUDE_XOPEN_SOURCE */ #ifdef _INCLUDE_XOPEN_SOURCE_EXTENDED /* Function prototype for ftok() */ #ifndef _NO_USER_PROTOS # ifdef __cplusplus extern "C" { # endif /* __cplusplus */ # if defined(__ia64) && !defined(_LIBC) /* pragmas needed to support -B protected */ # pragma extern ftok # endif /* __ia64 && ! _LIBC */ # ifdef _PROTOTYPES extern key_t ftok(const char *, int); # else /* not _PROTOTYPES */ extern key_t ftok(); # endif /* not _PROTOTYPES */ # ifdef __cplusplus } # endif /* __cplusplus */ #endif /* not _NO_USER_PROTOS */ #endif /* _INCLUDE_XOPEN_SOURCE_EXTENDED */ #ifdef _INCLUDE_HPUX_SOURCE /* Common IPC Definitions. */ /* Mode bits. */ # define IPC_ALLOC 0100000 /* entry currently allocated */ # define IPC_LOCKED 0040000 /* structure is locked */ # define IPC_WANTED 0004000 /* process waiting for lock */ /* ** Struct oipc_perm is the obsolete version of struct ipc_perm. ** It was used before release A.08.00. ** Object code compatibility is supported for old a.out files ** that were compiled with this version. However, old .o files ** should be recompiled with the new struct ipc_perm if they are ** to be linked with the C library made for release A.08.00 or ** later releases. **/ struct oipc_perm { unsigned short uid; /* owner's user id */ unsigned short gid; /* owner's group id */ unsigned short cuid; /* creator's user id */ unsigned short cgid; /* creator's group id */ unsigned short mode; /* access modes */ unsigned short seq; /* slot usage sequence number */ key_t key; /* key */ unsigned short ndx; /* ndx of proc who has lock */ unsigned short wait; /* waits, wanted, lock bits; reserved for specific ipc facilities */ }; struct ipcmap { unsigned int m_size; unsigned int m_addr; }; # define _IPCMAP_T # define ipcmapstart(X) (&(X)[1]) # define ipcmapwant(X) ((X)[0].m_addr) # define ipcmapsize(X) ((X)[0].m_size) # define ipcmapdata(X) {(X)-2, 0} , {0, 0} # define ipcmapinit(X, Y) ((X)[0].m_size = (Y)-2) /* * Define MAXUSHORT based on the MAXINT style which exists in param.h . * While at it, define our own IPC 'min()/max()' functions. */ #ifdef _KERNEL # define MAXUSHORT 0xffff # define IPCMIN(a,b) ( ((a)<(b)) ? (a) : (b) ) # define IPCMAX(a,b) ( ((a)>(b)) ? (a) : (b) ) #endif #endif /* _INCLUDE_HPUX_SOURCE */ #endif /* _SYS_IPC_INCLUDED */