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Tweak robust mutex detection for glibc

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This commit is contained in:
Howard Chu 2015-11-11 00:02:06 +00:00
parent 4e1ec79f0e
commit 79b12bbd7b
1 changed files with 16 additions and 7 deletions
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15
libraries/liblmdb/mdb.c
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@ -238,7 +238,9 @@ typedef SSIZE_T ssize_t;
#define MDB_OWNERDEAD EOWNERDEAD /**< #LOCK_MUTEX0() result if dead owner */
#endif
#ifdef __GLIBC__
#define GLIBC_VER ((__GLIBC__ << 16 )| __GLIBC_MINOR__)
#endif
/** Some platforms define the EOWNERDEAD error code
* even though they don't support Robust Mutexes.
* Compile with -DMDB_USE_ROBUST=0, or use some other
@ -248,11 +250,18 @@ typedef SSIZE_T ssize_t;
* either.)
*/
#ifndef MDB_USE_ROBUST
/* Android currently lacks Robust Mutex support */
#if defined(ANDROID) && defined(MDB_USE_POSIX_MUTEX) && !defined(MDB_USE_ROBUST)
/* Android currently lacks Robust Mutex support. So does glibc < 2.4. */
# if defined(MDB_USE_POSIX_MUTEX) && (defined(ANDROID) || \
(defined(__GLIBC__) && GLIBC_VER < 0x020004))
# define MDB_USE_ROBUST 0
# else
# define MDB_USE_ROBUST 1
/* glibc < 2.10 only provided _np API */
# if defined(__GLIBC__) && GLIBC_VER < 0x02000a
# define PTHREAD_MUTEX_ROBUST PTHREAD_MUTEX_ROBUST_NP
# define pthread_mutexattr_setrobust(attr, flag) pthread_mutexattr_setrobust_np(attr, flag)
# define pthread_mutex_consistent(mutex) pthread_mutex_consistent_np(mutex)
# endif
# endif
#endif /* MDB_USE_ROBUST */