diff options
author | Jesse Morgan <jesse@jesterpm.net> | 2016-12-17 21:28:53 -0800 |
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committer | Jesse Morgan <jesse@jesterpm.net> | 2016-12-17 21:28:53 -0800 |
commit | 54df2afaa61c6a03cbb4a33c9b90fa572b6d07b8 (patch) | |
tree | 18147b92b969d25ffbe61935fb63035cac820dd0 /db-4.8.30/os_windows/os_seek.c |
Berkeley DB 4.8 with rust build script for linux.
Diffstat (limited to 'db-4.8.30/os_windows/os_seek.c')
-rw-r--r-- | db-4.8.30/os_windows/os_seek.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/db-4.8.30/os_windows/os_seek.c b/db-4.8.30/os_windows/os_seek.c new file mode 100644 index 0000000..be689b9 --- /dev/null +++ b/db-4.8.30/os_windows/os_seek.c @@ -0,0 +1,65 @@ +/*- + * See the file LICENSE for redistribution information. + * + * Copyright (c) 1997-2009 Oracle. All rights reserved. + * + * $Id$ + */ + +#include "db_config.h" + +#include "db_int.h" + +/* + * __os_seek -- + * Seek to a page/byte offset in the file. + */ +int +__os_seek(env, fhp, pgno, pgsize, relative) + ENV *env; + DB_FH *fhp; + db_pgno_t pgno; + u_int32_t pgsize; + u_int32_t relative; +{ + /* Yes, this really is how Microsoft designed their API. */ + union { + __int64 bigint; + struct { + unsigned long low; + long high; + }; + } offbytes; + DB_ENV *dbenv; + off_t offset; + int ret; + + dbenv = env == NULL ? NULL : env->dbenv; + +#if defined(HAVE_STATISTICS) + ++fhp->seek_count; +#endif + + offset = (off_t)pgsize * pgno + relative; + + if (dbenv != NULL && FLD_ISSET(dbenv->verbose, DB_VERB_FILEOPS_ALL)) + __db_msg(env, + "fileops: seek %s to %lu", fhp->name, (u_long)offset); + + offbytes.bigint = offset; + ret = (SetFilePointer(fhp->handle, offbytes.low, + &offbytes.high, FILE_BEGIN) == (DWORD)-1) ? __os_get_syserr() : 0; + + if (ret == 0) { + fhp->pgsize = pgsize; + fhp->pgno = pgno; + fhp->offset = relative; + } else { + __db_syserr(env, ret, + "seek: %lu: (%lu * %lu) + %lu", (u_long)offset, + (u_long)pgno, (u_long)pgsize, (u_long)relative); + ret = __os_posix_err(ret); + } + + return (ret); +} |