diff options
Diffstat (limited to 'db2/db_int.h')
| -rw-r--r-- | db2/db_int.h | 132 |
1 files changed, 96 insertions, 36 deletions
diff --git a/db2/db_int.h b/db2/db_int.h index eacd3f9806..b48b104a91 100644 --- a/db2/db_int.h +++ b/db2/db_int.h @@ -1,10 +1,10 @@ /*- * See the file LICENSE for redistribution information. * - * Copyright (c) 1996, 1997 + * Copyright (c) 1996, 1997, 1998 * Sleepycat Software. All rights reserved. * - * @(#)db_int.h.src 10.41 (Sleepycat) 1/8/98 + * @(#)db_int.h.src 10.62 (Sleepycat) 5/23/98 */ #ifndef _DB_INTERNAL_H_ @@ -12,8 +12,6 @@ #include "db.h" /* Standard DB include file. */ #include "queue.h" -#include "os_func.h" -#include "os_ext.h" /******************************************************* * General purpose constants and macros. @@ -77,8 +75,8 @@ #define R_ADDR(base, offset) ((void *)((u_int8_t *)((base)->addr) + offset)) #define R_OFFSET(base, p) ((u_int8_t *)(p) - (u_int8_t *)(base)->addr) -/* Free and free-string macros that overwrite memory during debugging. */ -#ifdef DEBUG +/* Free and free-string macros that overwrite memory. */ +#ifdef DIAGNOSTIC #undef FREE #define FREE(p, len) { \ memset(p, 0xff, len); \ @@ -117,36 +115,41 @@ typedef struct __fn { #undef DB_LINE #define DB_LINE "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=" +/* Global variables. */ +typedef struct __db_globals { + int db_mutexlocks; /* DB_MUTEXLOCKS */ + int db_region_anon; /* DB_REGION_ANON, DB_REGION_NAME */ + int db_region_init; /* DB_REGION_INIT */ + int db_tsl_spins; /* DB_TSL_SPINS */ + int db_pageyield; /* DB_PAGEYIELD */ +} DB_GLOBALS; +extern DB_GLOBALS __db_global_values; +#define DB_GLOBAL(v) __db_global_values.v + /* Unused, or not-used-yet variable. "Shut that bloody compiler up!" */ #define COMPQUIET(n, v) (n) = (v) +/* + * Win16 needs specific syntax on callback functions. Nobody else cares. + */ +#ifndef DB_CALLBACK +#define DB_CALLBACK /* Nothing. */ +#endif + /******************************************************* * Files. *******************************************************/ -#ifndef MAXPATHLEN /* Maximum path length. */ -#ifdef PATH_MAX -#define MAXPATHLEN PATH_MAX -#else + /* + * We use 1024 as the maximum path length. It's too hard to figure out what + * the real path length is, as it was traditionally stored in <sys/param.h>, + * and that file isn't always available. + */ +#undef MAXPATHLEN #define MAXPATHLEN 1024 -#endif -#endif #define PATH_DOT "." /* Current working directory. */ #define PATH_SEPARATOR "/" /* Path separator character. */ -#ifndef S_IRUSR /* UNIX specific file permissions. */ -#define S_IRUSR 0000400 /* R for owner */ -#define S_IWUSR 0000200 /* W for owner */ -#define S_IRGRP 0000040 /* R for group */ -#define S_IWGRP 0000020 /* W for group */ -#define S_IROTH 0000004 /* R for other */ -#define S_IWOTH 0000002 /* W for other */ -#endif - -#ifndef S_ISDIR /* UNIX specific: directory test. */ -#define S_ISDIR(m) ((m & 0170000) == 0040000) -#endif - /******************************************************* * Mutex support. *******************************************************/ @@ -176,12 +179,12 @@ typedef unsigned char tsl_t; typedef struct _db_mutex_t { #ifdef HAVE_SPINLOCKS tsl_t tsl_resource; /* Resource test and set. */ -#ifdef DEBUG - u_long pid; /* Lock holder: 0 or process pid. */ +#ifdef DIAGNOSTIC + u_int32_t pid; /* Lock holder: 0 or process pid. */ #endif #else u_int32_t off; /* Backing file offset. */ - u_long pid; /* Lock holder: 0 or process pid. */ + u_int32_t pid; /* Lock holder: 0 or process pid. */ #endif u_int32_t spins; /* Spins before block. */ u_int32_t mutex_set_wait; /* Granted after wait. */ @@ -195,11 +198,11 @@ typedef struct _db_mutex_t { *******************************************************/ /* Lock/unlock a DB thread. */ #define DB_THREAD_LOCK(dbp) \ - (F_ISSET(dbp, DB_AM_THREAD) ? \ - __db_mutex_lock((db_mutex_t *)(dbp)->mutexp, -1) : 0) + if (F_ISSET(dbp, DB_AM_THREAD)) \ + (void)__db_mutex_lock((db_mutex_t *)(dbp)->mutexp, -1); #define DB_THREAD_UNLOCK(dbp) \ - (F_ISSET(dbp, DB_AM_THREAD) ? \ - __db_mutex_unlock((db_mutex_t *)(dbp)->mutexp, -1) : 0) + if (F_ISSET(dbp, DB_AM_THREAD)) \ + (void)__db_mutex_unlock((db_mutex_t *)(dbp)->mutexp, -1); /* Btree/recno local statistics structure. */ struct __db_bt_lstat; typedef struct __db_bt_lstat DB_BTREE_LSTAT; @@ -228,7 +231,7 @@ typedef enum { } APPNAME; /******************************************************* - * Regions. + * Shared memory regions. *******************************************************/ /* * The shared memory regions share an initial structure so that the general @@ -240,16 +243,69 @@ typedef enum { */ typedef struct _rlayout { db_mutex_t lock; /* Region mutex. */ +#define DB_REGIONMAGIC 0x120897 + u_int32_t valid; /* Valid magic number. */ u_int32_t refcnt; /* Region reference count. */ size_t size; /* Region length. */ int majver; /* Major version number. */ int minver; /* Minor version number. */ int patch; /* Patch version number. */ +#define INVALID_SEGID -1 + int segid; /* shmget(2) ID, or Win16 segment ID. */ -#define DB_R_DELETED 0x01 /* Region was deleted. */ +#define REGION_ANONYMOUS 0x01 /* Region is/should be in anon mem. */ u_int32_t flags; } RLAYOUT; +/* + * DB creates all regions on 4K boundaries out of sheer paranoia, so that + * we don't make the underlying VM unhappy. + */ +#define DB_VMPAGESIZE (4 * 1024) +#define DB_ROUNDOFF(i) { \ + (i) += DB_VMPAGESIZE - 1; \ + (i) -= (i) % DB_VMPAGESIZE; \ +} + +/* + * The interface to region attach is nasty, there is a lot of complex stuff + * going on, which has to be retained between create/attach and detach. The + * REGINFO structure keeps track of it. + */ +struct __db_reginfo; typedef struct __db_reginfo REGINFO; +struct __db_reginfo { + /* Arguments. */ + DB_ENV *dbenv; /* Region naming info. */ + APPNAME appname; /* Region naming info. */ + char *path; /* Region naming info. */ + const char *file; /* Region naming info. */ + int mode; /* Region mode, if a file. */ + size_t size; /* Region size. */ + u_int32_t dbflags; /* Region file open flags, if a file. */ + + /* Results. */ + char *name; /* Region name. */ + void *addr; /* Region address. */ + int fd; /* Fcntl(2) locking file descriptor. + NB: this is only valid if a regular + file is backing the shared region, + and mmap(2) is being used to map it + into our address space. */ + int segid; /* shmget(2) ID, or Win16 segment ID. */ + + /* Shared flags. */ +/* 0x0001 COMMON MASK with RLAYOUT structure. */ +#define REGION_CANGROW 0x0002 /* Can grow. */ +#define REGION_CREATED 0x0004 /* Created. */ +#define REGION_HOLDINGSYS 0x0008 /* Holding system resources. */ +#define REGION_LASTDETACH 0x0010 /* Delete on last detach. */ +#define REGION_MALLOC 0x0020 /* Created in malloc'd memory. */ +#define REGION_PRIVATE 0x0040 /* Private to thread/process. */ +#define REGION_REMOVED 0x0080 /* Already deleted. */ +#define REGION_SIZEDEF 0x0100 /* Use default region size if exists. */ + u_int32_t flags; +}; + /******************************************************* * Mpool. *******************************************************/ @@ -281,7 +337,7 @@ typedef struct __dbpginfo { #define DB_LOGGING(dbp) \ (F_ISSET(dbp, DB_AM_LOGGING) && !F_ISSET(dbp, DB_AM_RECOVER)) -#ifdef DEBUG +#ifdef DIAGNOSTIC /* * Debugging macro to log operations. * If DEBUG_WOP is defined, log operations that modify the database. @@ -318,7 +374,7 @@ typedef struct __dbpginfo { #else #define DEBUG_LREAD(D, T, O, K, A, F) #define DEBUG_LWRITE(D, T, O, K, A, F) -#endif /* DEBUG */ +#endif /* DIAGNOSTIC */ /******************************************************* * Transactions and recovery. @@ -339,4 +395,8 @@ struct __db_txn { size_t off; /* Detail structure within region. */ TAILQ_ENTRY(__db_txn) links; }; + +#include "os_func.h" +#include "os_ext.h" + #endif /* !_DB_INTERNAL_H_ */ |