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-rw-r--r--db2/os/os_config.c (renamed from db2/os/os_func.c)131
-rw-r--r--db2/os/os_open.c7
-rw-r--r--db2/os/os_spin.c56
3 files changed, 167 insertions, 27 deletions
diff --git a/db2/os/os_func.c b/db2/os/os_config.c
index afd40f4624..ecb4f1c2e7 100644
--- a/db2/os/os_func.c
+++ b/db2/os/os_config.c
@@ -8,7 +8,7 @@
#include "config.h"
#ifndef lint
-static const char sccsid[] = "@(#)os_func.c 10.4 (Sleepycat) 10/28/97";
+static const char sccsid[] = "@(#)os_config.c 10.9 (Sleepycat) 11/28/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
@@ -31,7 +31,6 @@ static const char sccsid[] = "@(#)os_func.c 10.4 (Sleepycat) 10/28/97";
#define imported
#endif
-imported extern void *calloc __P((size_t, size_t));
imported extern int close __P((int));
imported extern void free __P((void *));
imported extern int fsync __P((int));
@@ -42,16 +41,16 @@ imported extern char *strdup __P((const char *));
imported extern void *realloc __P((void *, size_t));
imported extern int unlink __P((const char *));
imported extern ssize_t write __P((int, const void *, size_t));
+imported extern void *memset __P((void *, int, size_t));
/*
* __db_jump --
* This list of interfaces that applications can replace. In some
* cases, the user is permitted to replace the standard ANSI C or
- * POSIX 1003.1 call, e.g., calloc or read. In others, we provide
+ * POSIX 1003.1 call, e.g., malloc or read. In others, we provide
* a local interface to the functionality, e.g., __os_map.
*/
struct __db_jumptab __db_jump = {
- calloc, /* DB_FUNC_CALLOC */
close, /* DB_FUNC_CLOSE */
__os_dirfree, /* DB_FUNC_DIRFREE */
__os_dirlist, /* DB_FUNC_DIRLIST */
@@ -73,9 +72,11 @@ struct __db_jumptab __db_jump = {
NULL /* DB_FUNC_YIELD */
};
+int __db_tsl_spins; /* DB_TSL_SPINS */
+
/*
* db_jump_set --
- * Replace an interface.
+ * Replace functions for the DB package.
*/
int
db_jump_set(func, which)
@@ -84,70 +85,148 @@ db_jump_set(func, which)
{
switch (which) {
case DB_FUNC_CALLOC:
- __db_calloc = (void *(*) __P((size_t, size_t)))func;
- break;
+ /*
+ * XXX
+ * Obsolete, calloc is no longer called by DB.
+ */
+ break;
case DB_FUNC_CLOSE:
- __os_close = (int (*) __P((int)))func;
+ __db_jump.db_close = (int (*) __P((int)))func;
break;
case DB_FUNC_DIRFREE:
- __db_dirfree = (void (*) __P((char **, int)))func;
+ __db_jump.db_dirfree = (void (*) __P((char **, int)))func;
break;
case DB_FUNC_DIRLIST:
- __db_dirlist =
+ __db_jump.db_dirlist =
(int (*) __P((const char *, char ***, int *)))func;
break;
case DB_FUNC_EXISTS:
- __db_exists = (int (*) __P((const char *, int *)))func;
+ __db_jump.db_exists = (int (*) __P((const char *, int *)))func;
break;
case DB_FUNC_FREE:
- __db_free = (void (*) __P((void *)))func;
+ __db_jump.db_free = (void (*) __P((void *)))func;
break;
case DB_FUNC_FSYNC:
- __os_fsync = (int (*) __P((int)))func;
+ __db_jump.db_fsync = (int (*) __P((int)))func;
break;
case DB_FUNC_IOINFO:
- __db_ioinfo =
+ __db_jump.db_ioinfo =
(int (*) __P((const char *, int, off_t *, off_t *)))func;
break;
case DB_FUNC_MALLOC:
- __db_malloc = (void *(*) __P((size_t)))func;
+ __db_jump.db_malloc = (void *(*) __P((size_t)))func;
break;
case DB_FUNC_MAP:
- __db_map = (int (*) __P((int, size_t, int, int, void **)))func;
+ __db_jump.db_map =
+ (int (*) __P((int, size_t, int, int, void **)))func;
break;
case DB_FUNC_OPEN:
- __os_open = (int (*) __P((const char *, int, ...)))func;
+ __db_jump.db_open = (int (*) __P((const char *, int, ...)))func;
break;
case DB_FUNC_READ:
- __os_read = (ssize_t (*) __P((int, void *, size_t)))func;
+ __db_jump.db_read =
+ (ssize_t (*) __P((int, void *, size_t)))func;
break;
case DB_FUNC_REALLOC:
- __db_realloc = (void *(*) __P((void *, size_t)))func;
+ __db_jump.db_realloc = (void *(*) __P((void *, size_t)))func;
break;
case DB_FUNC_SEEK:
- __db_seek =
+ __db_jump.db_seek =
(int (*) __P((int, size_t, db_pgno_t, u_long, int)))func;
break;
case DB_FUNC_SLEEP:
- __db_sleep = (int (*) __P((u_long, u_long)))func;
+ __db_jump.db_sleep = (int (*) __P((u_long, u_long)))func;
break;
case DB_FUNC_STRDUP:
- __db_strdup = (char *(*) __P((const char *)))func;
+ __db_jump.db_strdup = (char *(*) __P((const char *)))func;
break;
case DB_FUNC_UNLINK:
- __os_unlink = (int (*) __P((const char *)))func;
+ __db_jump.db_unlink = (int (*) __P((const char *)))func;
break;
case DB_FUNC_UNMAP:
- __db_unmap = (int (*) __P((void *, size_t)))func;
+ __db_jump.db_unmap = (int (*) __P((void *, size_t)))func;
break;
case DB_FUNC_WRITE:
- __os_write = (ssize_t (*) __P((int, const void *, size_t)))func;
+ __db_jump.db_write =
+ (ssize_t (*) __P((int, const void *, size_t)))func;
break;
case DB_FUNC_YIELD:
- __db_yield = (int (*) __P((void)))func;
+ __db_jump.db_yield = (int (*) __P((void)))func;
+ break;
+ default:
+ return (EINVAL);
+ }
+ return (0);
+}
+
+/*
+ * db_value_set --
+ * Replace values for the DB package.
+ */
+int
+db_value_set(value, which)
+ int value, which;
+{
+ switch (which) {
+ case DB_TSL_SPINS:
+ if (value <= 0)
+ return (EINVAL);
+ __db_tsl_spins = value;
break;
default:
return (EINVAL);
}
return (0);
}
+
+/*
+ * XXX
+ * Correct for systems that return NULL when you allocate 0 bytes of memory.
+ * There are several places in DB where we allocate the number of bytes held
+ * by the key/data item, and it can be 0. Correct here so that malloc never
+ * returns a NULL for that reason.
+ */
+/*
+ * __db_calloc --
+ * The calloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_calloc __P((size_t, size_t));
+ */
+void *
+__db_calloc(num, size)
+ size_t num, size;
+{
+ void *p;
+
+ size *= num;
+ if ((p = __db_jump.db_malloc(size == 0 ? 1 : size)) != NULL)
+ memset(p, 0, size);
+ return (p);
+}
+
+/*
+ * __db_malloc --
+ * The malloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_malloc __P((size_t));
+ */
+void *
+__db_malloc(size)
+ size_t size;
+{
+ return (__db_jump.db_malloc(size == 0 ? 1 : size));
+}
+
+/*
+ * __db_realloc --
+ * The realloc(3) function for DB.
+ *
+ * PUBLIC: void *__db_realloc __P((void *, size_t));
+ */
+void *
+__db_realloc(ptr, size)
+ void *ptr;
+ size_t size;
+{
+ return (__db_jump.db_realloc(ptr, size == 0 ? 1 : size));
+}
diff --git a/db2/os/os_open.c b/db2/os/os_open.c
index 05784e4810..a628765556 100644
--- a/db2/os/os_open.c
+++ b/db2/os/os_open.c
@@ -8,7 +8,7 @@
#include "config.h"
#ifndef lint
-static const char sccsid[] = "@(#)os_open.c 10.19 (Sleepycat) 10/28/97";
+static const char sccsid[] = "@(#)os_open.c 10.20 (Sleepycat) 11/27/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
@@ -38,6 +38,11 @@ __db_open(name, arg_flags, ok_flags, mode, fdp)
return (EINVAL);
flags = 0;
+
+ /*
+ * DB requires the semantic that two files opened at the same time
+ * with O_CREAT and O_EXCL set will return failure in at least one.
+ */
if (arg_flags & DB_CREATE)
flags |= O_CREAT;
diff --git a/db2/os/os_spin.c b/db2/os/os_spin.c
new file mode 100644
index 0000000000..fb693c2848
--- /dev/null
+++ b/db2/os/os_spin.c
@@ -0,0 +1,56 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1997
+ * Sleepycat Software. All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)os_spin.c 10.3 (Sleepycat) 11/25/97";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <limits.h>
+#include <unistd.h>
+#endif
+
+#include "db_int.h"
+
+/*
+ * __os_spin --
+ * Return the number of default spins before blocking.
+ *
+ * PUBLIC: int __os_spin __P((void));
+ */
+int
+__os_spin()
+{
+ extern int __db_tsl_spins;
+
+ /* If the application specified the spins, use its value. */
+ if (__db_tsl_spins != 0)
+ return (__db_tsl_spins);
+
+ /*
+ * XXX
+ * Sysconf: Solaris uses _SC_NPROCESSORS_ONLN to return the number
+ * of online processors. I don't know if this call is portable or
+ * not.
+ */
+#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
+ {
+ long sys_val;
+
+ sys_val = sysconf(_SC_NPROCESSORS_ONLN);
+ if (sys_val > 0)
+ return (sys_val * 50);
+ }
+#endif
+
+ /* Default to a single processor. */
+ return (1);
+}
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