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-rw-r--r--db2/db_int.h132
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_ */
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