summaryrefslogtreecommitdiff
path: root/db2/common/db_region.c
diff options
context:
space:
mode:
Diffstat (limited to 'db2/common/db_region.c')
-rw-r--r--db2/common/db_region.c103
1 files changed, 64 insertions, 39 deletions
diff --git a/db2/common/db_region.c b/db2/common/db_region.c
index 86d79a8148..3e8cd2dc66 100644
--- a/db2/common/db_region.c
+++ b/db2/common/db_region.c
@@ -43,7 +43,7 @@
#include "config.h"
#ifndef lint
-static const char sccsid[] = "@(#)db_region.c 10.13 (Sleepycat) 8/27/97";
+static const char sccsid[] = "@(#)db_region.c 10.15 (Sleepycat) 10/25/97";
#endif /* not lint */
#ifndef NO_SYSTEM_INCLUDES
@@ -114,7 +114,7 @@ __db_rcreate(dbenv, appname, path, file, mode, size, fdp, retp)
* attempts to create the region will return failure in one of the
* attempts.
*/
- if (fd == -1 && (ret = __db_fdopen(name,
+ if (fd == -1 && (ret = __db_open(name,
DB_CREATE | DB_EXCL, DB_CREATE | DB_EXCL, mode, &fd)) != 0) {
if (ret != EEXIST)
__db_err(dbenv,
@@ -131,6 +131,42 @@ __db_rcreate(dbenv, appname, path, file, mode, size, fdp, retp)
if ((ret = __db_rmap(dbenv, fd, size, &rp)) != 0)
goto err;
+ /* Initialize the region. */
+ if ((ret = __db_rinit(dbenv, rp, fd, size, 1)) != 0)
+ goto err;
+
+ if (name != NULL)
+ FREES(name);
+
+ *(void **)retp = rp;
+ return (0);
+
+err: if (fd != -1) {
+ if (rp != NULL)
+ (void)__db_unmap(rp, rp->size);
+ (void)__db_unlink(name);
+ (void)__db_close(fd);
+ }
+ if (name != NULL)
+ FREES(name);
+ return (ret);
+}
+
+/*
+ * __db_rinit --
+ * Initialize the region.
+ *
+ * PUBLIC: int __db_rinit __P((DB_ENV *, RLAYOUT *, int, size_t, int));
+ */
+int
+__db_rinit(dbenv, rp, fd, size, lock_region)
+ DB_ENV *dbenv;
+ RLAYOUT *rp;
+ size_t size;
+ int fd, lock_region;
+{
+ int ret;
+
/*
* Initialize the common information.
*
@@ -141,9 +177,12 @@ __db_rcreate(dbenv, appname, path, file, mode, size, fdp, retp)
* file permissions games, but we can't because WNT filesystems won't
* open a file mode 0.
*
- * So, the process that's creating the region always acquires the lock
- * before the setting the version number. Any process joining always
- * checks the version number before attempting to acquire the lock.
+ * If the lock_region flag is set, the process creating the region
+ * acquires the lock before the setting the version number. Any
+ * process joining the region checks the version number before
+ * attempting to acquire the lock. (The lock_region flag may not be
+ * set -- the mpool code sometimes malloc's private regions but still
+ * needs to initialize them, specifically, the mutex for threads.)
*
* We have to check the version number first, because if the version
* number has not been written, it's possible that the mutex has not
@@ -151,30 +190,16 @@ __db_rcreate(dbenv, appname, path, file, mode, size, fdp, retp)
* random behavior. If the version number isn't there (the file size
* is too small) or it's 0, we know that the region is being created.
*/
- (void)__db_mutex_init(&rp->lock, MUTEX_LOCK_OFFSET(rp, &rp->lock));
- (void)__db_mutex_lock(&rp->lock,
- fd, dbenv == NULL ? NULL : dbenv->db_yield);
+ __db_mutex_init(&rp->lock, MUTEX_LOCK_OFFSET(rp, &rp->lock));
+ if (lock_region && (ret = __db_mutex_lock(&rp->lock, fd)) != 0)
+ return (ret);
rp->refcnt = 1;
rp->size = size;
rp->flags = 0;
db_version(&rp->majver, &rp->minver, &rp->patch);
- if (name != NULL)
- FREES(name);
-
- *(void **)retp = rp;
return (0);
-
-err: if (fd != -1) {
- if (rp != NULL)
- (void)__db_munmap(rp, rp->size);
- (void)__db_unlink(name);
- (void)__db_close(fd);
- }
- if (name != NULL)
- FREES(name);
- return (ret);
}
/*
@@ -205,7 +230,7 @@ __db_ropen(dbenv, appname, path, file, flags, fdp, retp)
return (ret);
/* Open the file. */
- if ((ret = __db_fdopen(name, flags, DB_MUTEXDEBUG, 0, &fd)) != 0) {
+ if ((ret = __db_open(name, flags, DB_MUTEXDEBUG, 0, &fd)) != 0) {
__db_err(dbenv, "region open: %s: %s", name, strerror(ret));
goto err2;
}
@@ -225,8 +250,10 @@ __db_ropen(dbenv, appname, path, file, flags, fdp, retp)
* flatly impossible. Hope that mmap fails if the file is too large.
*
*/
- if ((ret = __db_stat(dbenv, name, fd, &size1, NULL)) != 0)
+ if ((ret = __db_ioinfo(name, fd, &size1, NULL)) != 0) {
+ __db_err(dbenv, "%s: %s", name, strerror(ret));
goto err2;
+ }
/* Check to make sure the first block has been written. */
if ((size_t)size1 < sizeof(RLAYOUT)) {
@@ -249,16 +276,17 @@ __db_ropen(dbenv, appname, path, file, flags, fdp, retp)
/* Get the region lock. */
if (!LF_ISSET(DB_MUTEXDEBUG))
- (void)__db_mutex_lock(&rp->lock,
- fd, dbenv == NULL ? NULL : dbenv->db_yield);
+ (void)__db_mutex_lock(&rp->lock, fd);
/*
* The file may have been half-written if we were descheduled between
* getting the size of the file and checking the major version. Check
* to make sure we got the entire file.
*/
- if ((ret = __db_stat(dbenv, name, fd, &size2, NULL)) != 0)
+ if ((ret = __db_ioinfo(name, fd, &size2, NULL)) != 0) {
+ __db_err(dbenv, "%s: %s", name, strerror(ret));
goto err1;
+ }
if (size1 != size2) {
ret = EAGAIN;
goto err1;
@@ -285,7 +313,7 @@ __db_ropen(dbenv, appname, path, file, flags, fdp, retp)
err1: if (!LF_ISSET(DB_MUTEXDEBUG))
(void)__db_mutex_unlock(&rp->lock, fd);
err2: if (rp != NULL)
- (void)__db_munmap(rp, rp->size);
+ (void)__db_unmap(rp, rp->size);
if (fd != -1)
(void)__db_close(fd);
FREES(name);
@@ -312,8 +340,7 @@ __db_rclose(dbenv, fd, ptr)
fail = NULL;
/* Get the lock. */
- if ((ret = __db_mutex_lock(&rp->lock,
- fd, dbenv == NULL ? NULL : dbenv->db_yield)) != 0) {
+ if ((ret = __db_mutex_lock(&rp->lock, fd)) != 0) {
fail = "lock get";
goto err;
}
@@ -328,7 +355,7 @@ __db_rclose(dbenv, fd, ptr)
}
/* Discard the region. */
- if ((t_ret = __db_munmap(ptr, rp->size)) != 0 && fail == NULL) {
+ if ((t_ret = __db_unmap(ptr, rp->size)) != 0 && fail == NULL) {
ret = t_ret;
fail = "munmap";
}
@@ -392,8 +419,7 @@ __db_runlink(dbenv, appname, path, file, force)
/* Open and lock the region. */
if ((ret = __db_ropen(dbenv, appname, path, file, 0, &fd, &rp)) != 0)
goto err1;
- (void)__db_mutex_lock(&rp->lock,
- fd, dbenv == NULL ? NULL : dbenv->db_yield);
+ (void)__db_mutex_lock(&rp->lock, fd);
/* If the region is currently being deleted, fail. */
if (F_ISSET(rp, DB_R_DELETED)) {
@@ -434,8 +460,7 @@ __db_runlink(dbenv, appname, path, file, force)
/* Not a clue. Try to clear the DB_R_DELETED flag. */
if ((ret = __db_ropen(dbenv, appname, path, file, 0, &fd, &rp)) != 0)
goto err1;
- (void)__db_mutex_lock(&rp->lock,
- fd, dbenv == NULL ? NULL : dbenv->db_yield);
+ (void)__db_mutex_lock(&rp->lock, fd);
F_CLR(rp, DB_R_DELETED);
/* FALLTHROUGH */
@@ -472,7 +497,7 @@ __db_rgrow(dbenv, fd, incr)
char buf[__DB_VMPAGESIZE];
/* Seek to the end of the region. */
- if ((ret = __db_lseek(fd, 0, 0, 0, SEEK_END)) != 0)
+ if ((ret = __db_seek(fd, 0, 0, 0, SEEK_END)) != 0)
goto err;
/* Write nuls to the new bytes. */
@@ -500,7 +525,7 @@ __db_rgrow(dbenv, fd, incr)
incr -= incr % __DB_VMPAGESIZE;
/* Write the last page, not the page after the last. */
- if ((ret = __db_lseek(fd, 0, 0, incr - __DB_VMPAGESIZE, SEEK_CUR)) != 0)
+ if ((ret = __db_seek(fd, 0, 0, incr - __DB_VMPAGESIZE, SEEK_CUR)) != 0)
goto err;
if ((ret = __db_write(fd, buf, sizeof(buf), &nw)) != 0)
goto err;
@@ -531,7 +556,7 @@ __db_rremap(dbenv, ptr, oldsize, newsize, fd, retp)
{
int ret;
- if ((ret = __db_munmap(ptr, oldsize)) != 0) {
+ if ((ret = __db_unmap(ptr, oldsize)) != 0) {
__db_err(dbenv, "region remap: munmap: %s", strerror(ret));
return (ret);
}
@@ -553,7 +578,7 @@ __db_rmap(dbenv, fd, size, retp)
RLAYOUT *rp;
int ret;
- if ((ret = __db_mmap(fd, size, 0, 0, &rp)) != 0) {
+ if ((ret = __db_map(fd, size, 0, 0, (void **)&rp)) != 0) {
__db_err(dbenv, "region map: mmap %s", strerror(ret));
return (ret);
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-27 10:51:34 +0000