diff options
Diffstat (limited to 'db2/db_int.h')
| -rw-r--r-- | db2/db_int.h | 29 |
1 files changed, 22 insertions, 7 deletions
diff --git a/db2/db_int.h b/db2/db_int.h index 2146072..eacd3f9 100644 --- a/db2/db_int.h +++ b/db2/db_int.h @@ -4,7 +4,7 @@ * Copyright (c) 1996, 1997 * Sleepycat Software. All rights reserved. * - * @(#)db_int.h.src 10.37 (Sleepycat) 11/25/97 + * @(#)db_int.h.src 10.41 (Sleepycat) 1/8/98 */ #ifndef _DB_INTERNAL_H_ @@ -18,14 +18,22 @@ /******************************************************* * General purpose constants and macros. *******************************************************/ -#define UINT32_T_MAX 0xffffffff /* Maximum 32 bit unsigned. */ #define UINT16_T_MAX 0xffff /* Maximum 16 bit unsigned. */ +#define UINT32_T_MAX 0xffffffff /* Maximum 32 bit unsigned. */ #define DB_MIN_PGSIZE 0x000200 /* Minimum page size. */ #define DB_MAX_PGSIZE 0x010000 /* Maximum page size. */ #define DB_MINCACHE 10 /* Minimum cached pages */ +#define MEGABYTE 1048576 + +/* + * If we are unable to determine the underlying filesystem block size, use + * 8K on the grounds that most OS's use less than 8K as their VM page size. + */ +#define DB_DEF_IOSIZE (8 * 1024) + /* * Aligning items to particular sizes or in pages or memory. ALIGNP is a * separate macro, as we've had to cast the pointer to different integral @@ -109,6 +117,9 @@ typedef struct __fn { #undef DB_LINE #define DB_LINE "=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=" +/* Unused, or not-used-yet variable. "Shut that bloody compiler up!" */ +#define COMPQUIET(n, v) (n) = (v) + /******************************************************* * Files. *******************************************************/ @@ -155,18 +166,22 @@ typedef unsigned char tsl_t; /* * The offset of a mutex in memory. + * + * !!! + * Not an off_t, so backing file offsets MUST be less than 4Gb. See the + * off field of the db_mutex_t as well. */ -#define MUTEX_LOCK_OFFSET(a, b) ((off_t)((u_int8_t *)b - (u_int8_t *)a)) +#define MUTEX_LOCK_OFFSET(a, b) ((u_int32_t)((u_int8_t *)b - (u_int8_t *)a)) typedef struct _db_mutex_t { #ifdef HAVE_SPINLOCKS - tsl_t tsl_resource; /* Resource test and set. */ + tsl_t tsl_resource; /* Resource test and set. */ #ifdef DEBUG - u_long pid; /* Lock holder: 0 or process pid. */ + u_long pid; /* Lock holder: 0 or process pid. */ #endif #else - off_t off; /* Backing file offset. */ - u_long pid; /* Lock holder: 0 or process pid. */ + u_int32_t off; /* Backing file offset. */ + u_long pid; /* Lock holder: 0 or process pid. */ #endif u_int32_t spins; /* Spins before block. */ u_int32_t mutex_set_wait; /* Granted after wait. */ |