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Add MDB_NO_ROBUST to disable Robust Mutexes

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This commit is contained in:
Howard Chu 2015-10-31 02:11:47 +00:00
parent 550df2a583
commit 447f552756
2 changed files with 20 additions and 1 deletions
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1
libraries/liblmdb/Makefile
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@ -13,6 +13,7 @@
# - MDB_FDATASYNC
# - MDB_FDATASYNC_WORKS
# - MDB_USE_PWRITEV
# - MDB_NO_ROBUST
#
# There may be other macros in mdb.c of interest. You should
# read mdb.c before changing any of them.

20
libraries/liblmdb/mdb.c
View File

@ -238,7 +238,25 @@ typedef SSIZE_T ssize_t;
#define MDB_OWNERDEAD EOWNERDEAD /**< #LOCK_MUTEX0() result if dead owner */
#endif
#ifdef MDB_OWNERDEAD
/* Android currently lacks Robust Mutex support */
#if defined(ANDROID) && defined(MDB_USE_POSIX_MUTEX)
#define MDB_NO_ROBUST 1
#endif
/** Some platforms define the EOWNERDEAD error code
* even though they don't support Robust Mutexes.
* Compile with -DMDB_NO_ROBUST, or use some other
* mechanism like -DMDB_USE_SYSV_SEM instead of
* -DMDB_USE_POSIX_MUTEX. (SysV semaphores are
* also Robust, but some systems don't support them
* either.)
*/
#ifndef MDB_NO_ROBUST
#define MDB_NO_ROBUST 0
#endif
#if defined(MDB_OWNERDEAD) && !(MDB_NO_ROBUST)
#define MDB_ROBUST_SUPPORTED 1
#endif