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* Fix for a locking bug in Berkeley DB on Cygwin.

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This commit is contained in:
Rob Vermaas 2006-06-07 15:27:17 +00:00
parent 23960e92df
commit 370af25eff
2 changed files with 23 additions and 1 deletions
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21
externals/bdb-cygwin.patch vendored Normal file
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@ -0,0 +1,21 @@
diff -rc db-4.4.20.NC-old/os/os_flock.c db-4.4.20.NC/os/os_flock.c
*** db-4.4.20.NC-old/os/os_flock.c Mon Jun 20 16:59:01 2005
--- db-4.4.20.NC/os/os_flock.c Wed Jun 7 17:01:49 2006
***************
*** 36,41 ****
--- 36,50 ----
DB_ASSERT(F_ISSET(fhp, DB_FH_OPENED) && fhp->fd != -1);
+ #ifdef __CYGWIN__
+ /*
+ * Windows file locking interferes with read/write operations, so we
+ * map the ranges to an area past the end of the file.
+ */
+ DB_ASSERT(offset < (off_t) 1 << 62);
+ offset += (off_t) 1 << 62;
+ #endif
+
#ifdef HAVE_FCNTL
fl.l_start = offset;
fl.l_len = 1;