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Add MDB_USE_POSIX_MUTEX.

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So far just to help aligning mdb.master and mdb.RE.
We'll make it an option later.
This commit is contained in:
Hallvard Furuseth 2015-07-02 21:06:27 +02:00
parent 7d162bcf31
commit 8293b20cfe
1 changed files with 18 additions and 11 deletions
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29
libraries/liblmdb/mdb.c
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@ -128,9 +128,16 @@ union semun {
unsigned short *array;
};
#endif /* _SEM_SEMUN_UNDEFINED */
#else
#define MDB_USE_POSIX_MUTEX 1
#endif /* MDB_USE_SYSV_SEM */
#endif /* !_WIN32 */
#if defined(_WIN32) + defined(MDB_USE_SYSV_SEM) \
+ defined(MDB_USE_POSIX_MUTEX) != 1
# error "Ambiguous shared-lock implementation"
#endif
#ifdef USE_VALGRIND
#include <valgrind/memcheck.h>
#define VGMEMP_CREATE(h,r,z) VALGRIND_CREATE_MEMPOOL(h,r,z)
@ -206,10 +213,6 @@ union semun {
/** Features under development */
#ifndef MDB_DEVEL
#define MDB_DEVEL 0
#endif
#if defined(_WIN32) || defined(MDB_USE_SYSV_SEM) || defined(EOWNERDEAD)
#define MDB_ROBUST_SUPPORTED 1
#endif
/** Wrapper around __func__, which is a C99 feature */
@ -228,8 +231,12 @@ union semun {
#define MDB_OWNERDEAD ((int) WAIT_ABANDONED)
#elif defined MDB_USE_SYSV_SEM
#define MDB_OWNERDEAD (MDB_LAST_ERRCODE + 11)
#else
#define MDB_OWNERDEAD EOWNERDEAD
#elif defined(MDB_USE_POSIX_MUTEX) && defined(EOWNERDEAD)
#define MDB_OWNERDEAD EOWNERDEAD /**< #LOCK_MUTEX0() result if dead owner */
#endif
#ifdef MDB_OWNERDEAD
#define MDB_ROBUST_SUPPORTED 1
#endif
#ifdef _WIN32
@ -314,7 +321,7 @@ mdb_sem_wait(mdb_mutex_t *sem)
#define mdb_mutex_consistent(mutex) 0
#else
#else /* MDB_USE_POSIX_MUTEX: */
/** Pointer/HANDLE type of shared mutex/semaphore.
*/
typedef pthread_mutex_t mdb_mutex_t;
@ -1290,7 +1297,7 @@ static int mdb_page_split(MDB_cursor *mc, MDB_val *newkey, MDB_val *newdata,
static int mdb_env_read_header(MDB_env *env, MDB_meta *meta);
static int mdb_env_pick_meta(const MDB_env *env);
static int mdb_env_write_meta(MDB_txn *txn);
#if !(defined(_WIN32) || defined(MDB_USE_SYSV_SEM)) /* Drop unused excl arg */
#ifdef MDB_USE_POSIX_MUTEX /* Drop unused excl arg */
# define mdb_env_close0(env, excl) mdb_env_close1(env)
#endif
static void mdb_env_close0(MDB_env *env, int excl);
@ -4303,8 +4310,8 @@ mdb_env_excl_lock(MDB_env *env, int *excl)
if (!rc) {
*excl = 1;
} else
# ifdef MDB_USE_SYSV_SEM
if (*excl < 0) /* always true when !MDB_USE_SYSV_SEM */
# ifndef MDB_USE_POSIX_MUTEX
if (*excl < 0) /* always true when MDB_USE_POSIX_MUTEX */
# endif
{
lock_info.l_type = F_RDLCK;
@ -4558,7 +4565,7 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl)
if (semctl(semid, 0, SETALL, semu) < 0)
goto fail_errno;
env->me_txns->mti_semid = semid;
#else /* MDB_USE_SYSV_SEM */
#else /* MDB_USE_POSIX_MUTEX: */
pthread_mutexattr_t mattr;
if ((rc = pthread_mutexattr_init(&mattr))