From 30736a0ff5baf9159e02a0562ac7bd31ea128c3d Mon Sep 17 00:00:00 2001 From: Howard Chu Date: Thu, 1 Sep 2011 03:38:48 -0700 Subject: [PATCH] Ugly-as-sin initial Windows port --- libraries/libmdb/mdb.c | 431 ++++++++++++++++++++++++++++++++++------- 1 file changed, 361 insertions(+), 70 deletions(-) diff --git a/libraries/libmdb/mdb.c b/libraries/libmdb/mdb.c index 3cedad75c7..32beaaf54e 100644 --- a/libraries/libmdb/mdb.c +++ b/libraries/libmdb/mdb.c @@ -35,12 +35,16 @@ #include #include #include +#ifdef _WIN32 +#include +#else #include #include #ifdef HAVE_SYS_FILE_H #include #endif #include +#endif #include #include @@ -51,8 +55,42 @@ #include #include #include +#ifdef _WIN32 +#define pthread_t DWORD +#define pthread_mutex_t HANDLE +#define pthread_key_t DWORD +#define pthread_self() GetCurrentThreadId() +#define pthread_key_create(x,y) *(x) = TlsAlloc() +#define pthread_key_delete(x) TlsFree(x) +#define pthread_getspecific(x) TlsGetValue(x) +#define pthread_setspecific(x,y) TlsSetValue(x,y) +#define pthread_mutex_unlock(x) ReleaseMutex(x) +#define pthread_mutex_lock(x) WaitForSingleObject(x, INFINITE) +#define LOCK_MUTEX_R(env) pthread_mutex_lock(env->me_rmutex) +#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(env->me_rmutex) +#define LOCK_MUTEX_W(env) pthread_mutex_lock(env->me_wmutex) +#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(env->me_wmutex) +#define getpid() GetCurrentProcessId() +#else #include +#define LOCK_MUTEX_R(env) pthread_mutex_lock(&env->me_txns->mti_mutex) +#define UNLOCK_MUTEX_R(env) pthread_mutex_unlock(&env->me_txns->mti_mutex) +#define LOCK_MUTEX_W(env) pthread_mutex_lock(&env->me_txns->mti_wmutex) +#define UNLOCK_MUTEX_W(env) pthread_mutex_unlock(&env->me_txns->mti_wmutex) +#endif +#ifdef _WIN32 +#define fdatasync(fd) !FlushFileBuffers(fd) +#define ErrCode() GetLastError() +#define GetPageSize(x) {SYSTEM_INFO si; GetSystemInfo(&si); (x) = si.dwPageSize;} +#define close(fd) CloseHandle(fd) +#define munmap(ptr,len) UnmapViewOfFile(ptr) +#else +#define ErrCode() errno +#define HANDLE int +#define INVALID_HANDLE_VALUE -1 +#define GetPageSize(x) (x) = sysconf(_SC_PAGE_SIZE) +#endif #include "mdb.h" #define ULONG unsigned long @@ -156,7 +194,16 @@ typedef struct MDB_reader { typedef struct MDB_txbody { uint32_t mtb_magic; uint32_t mtb_version; +/* For POSIX the actual mutexes reside in shared memory. + * On Windows, mutexes are allocated by the kernel; we store + * the name in shared memory so that other processes can + * grab them. + */ +#ifdef _WIN32 + char mtb_rmname[32]; +#else pthread_mutex_t mtb_mutex; +#endif ULONG mtb_txnid; uint32_t mtb_numreaders; uint32_t mtb_me_toggle; @@ -168,14 +215,20 @@ typedef struct MDB_txninfo { #define mti_magic mt1.mtb.mtb_magic #define mti_version mt1.mtb.mtb_version #define mti_mutex mt1.mtb.mtb_mutex +#define mti_rmname mt1.mtb.mtb_rmname #define mti_txnid mt1.mtb.mtb_txnid #define mti_numreaders mt1.mtb.mtb_numreaders #define mti_me_toggle mt1.mtb.mtb_me_toggle char pad[(sizeof(MDB_txbody)+CACHELINE-1) & ~(CACHELINE-1)]; } mt1; union { +#ifdef _WIN32 + char mt2_wmname[32]; +#define mti_wmname mt2.mt2_wmname +#else pthread_mutex_t mt2_wmutex; #define mti_wmutex mt2.mt2_wmutex +#endif char pad[(sizeof(pthread_mutex_t)+CACHELINE-1) & ~(CACHELINE-1)]; } mt2; MDB_reader mti_readers[1]; @@ -351,9 +404,9 @@ typedef struct MDB_xcursor { } MDB_xcursor; struct MDB_env { - int me_fd; - int me_lfd; - int me_mfd; /* just for writing the meta pages */ + HANDLE me_fd; + HANDLE me_lfd; + HANDLE me_mfd; /* just for writing the meta pages */ #define MDB_FATAL_ERROR 0x80000000U uint32_t me_flags; uint32_t me_extrapad; /* unused for now */ @@ -378,6 +431,10 @@ struct MDB_env { pgno_t me_free_pgs[MDB_IDL_UM_SIZE]; MIDL2 me_dirty_list[MDB_IDL_DB_SIZE]; LAZY_RWLOCK_DEF(me_dblock); +#ifdef _WIN32 + HANDLE me_rmutex; /* Windows mutexes don't reside in shared mem */ + HANDLE me_wmutex; +#endif }; #define NODESIZE offsetof(MDB_node, mn_data) @@ -464,6 +521,12 @@ static int memncmp(const void *s1, size_t n1, static int memnrcmp(const void *s1, size_t n1, const void *s2, size_t n2); +#ifdef _WIN32 +static SECURITY_DESCRIPTOR mdb_null_sd; +static SECURITY_ATTRIBUTES mdb_all_sa; +static int mdb_sec_inited; +#endif + static int memncmp(const void *s1, size_t n1, const void *s2, size_t n2) { @@ -506,7 +569,7 @@ mdb_version(int *maj, int *min, int *pat) return MDB_VERSION_STRING; } -static char *const errstr[] = { +static char *const mdb_errstr[] = { "MDB_KEYEXIST: Key/data pair already exists", "MDB_NOTFOUND: No matching key/data pair found", "MDB_PAGE_NOTFOUND: Requested page not found", @@ -522,7 +585,7 @@ mdb_strerror(int err) return ("Successful return: 0"); if (err >= MDB_KEYEXIST && err <= MDB_VERSION_MISMATCH) - return errstr[err - MDB_KEYEXIST]; + return mdb_errstr[err - MDB_KEYEXIST]; return strerror(err); } @@ -731,7 +794,7 @@ mdb_env_sync(MDB_env *env, int force) int rc = 0; if (force || !F_ISSET(env->me_flags, MDB_NOSYNC)) { if (fdatasync(env->me_fd)) - rc = errno; + rc = ErrCode(); } return rc; } @@ -751,19 +814,19 @@ mdb_txn_renew0(MDB_txn *txn) pid_t pid = getpid(); pthread_t tid = pthread_self(); - pthread_mutex_lock(&env->me_txns->mti_mutex); + LOCK_MUTEX_R(env); for (i=0; ime_txns->mti_numreaders; i++) if (env->me_txns->mti_readers[i].mr_pid == 0) break; if (i == env->me_maxreaders) { - pthread_mutex_unlock(&env->me_txns->mti_mutex); + UNLOCK_MUTEX_R(env); return ENOMEM; } env->me_txns->mti_readers[i].mr_pid = pid; env->me_txns->mti_readers[i].mr_tid = tid; if (i >= env->me_txns->mti_numreaders) env->me_txns->mti_numreaders = i+1; - pthread_mutex_unlock(&env->me_txns->mti_mutex); + UNLOCK_MUTEX_R(env); r = &env->me_txns->mti_readers[i]; pthread_setspecific(env->me_txkey, r); } @@ -772,7 +835,7 @@ mdb_txn_renew0(MDB_txn *txn) r->mr_txnid = txn->mt_txnid; txn->mt_u.reader = r; } else { - pthread_mutex_lock(&env->me_txns->mti_wmutex); + LOCK_MUTEX_W(env); txn->mt_txnid = env->me_txns->mti_txnid+1; txn->mt_toggle = env->me_txns->mti_me_toggle; @@ -830,7 +893,7 @@ mdb_txn_begin(MDB_env *env, unsigned int flags, MDB_txn **ret) return MDB_PANIC; } if ((txn = calloc(1, sizeof(MDB_txn) + env->me_maxdbs * sizeof(MDB_db))) == NULL) { - DPRINTF("calloc: %s", strerror(errno)); + DPRINTF("calloc: %s", strerror(ErrCode())); return ENOMEM; } txn->mt_dbs = (MDB_db *)(txn+1); @@ -884,7 +947,7 @@ mdb_txn_reset0(MDB_txn *txn) env->me_txn = NULL; for (i=2; ime_numdbs; i++) env->me_dbxs[i].md_dirty = 0; - pthread_mutex_unlock(&env->me_txns->mti_wmutex); + UNLOCK_MUTEX_W(env); } } @@ -925,7 +988,6 @@ mdb_txn_commit(MDB_txn *txn) MDB_dpage *dp; MDB_env *env; pgno_t next; - struct iovec iov[MDB_COMMIT_PAGES]; assert(txn != NULL); assert(txn->mt_env != NULL); @@ -1041,6 +1103,36 @@ mdb_txn_commit(MDB_txn *txn) next = 0; i = 1; do { +#ifdef _WIN32 + /* Windows actually supports scatter/gather I/O, but only on + * unbuffered file handles. Since we're relying on the OS page + * cache for all our data, that's self-defeating. So we just + * write pages one at a time. We use the ov structure to set + * the write offset, to at least save the overhead of a Seek + * system call. + */ + OVERLAPPED ov; + memset(&ov, 0, sizeof(ov)); + for (; i<=txn->mt_u.dirty_list[0].mid; i++) { + dp = txn->mt_u.dirty_list[i].mptr; + DPRINTF("committing page %lu", dp->p.mp_pgno); + size = dp->p.mp_pgno * env->me_psize; + ov.Offset = size & 0xffffffff; + ov.OffsetHigh = size >> 16; + ov.OffsetHigh >>= 16; + /* clear dirty flag */ + dp->p.mp_flags &= ~P_DIRTY; + rc = WriteFile(env->me_fd, &dp->p, env->me_psize * dp->h.md_num, NULL, &ov); + if (!rc) { + n = ErrCode(); + DPRINTF("WriteFile: %d", n); + mdb_txn_abort(txn); + return n; + } + } + done = 1;; +#else + struct iovec iov[MDB_COMMIT_PAGES]; n = 0; done = 1; size = 0; @@ -1051,11 +1143,11 @@ mdb_txn_commit(MDB_txn *txn) DPRINTF("committing %u dirty pages", n); rc = writev(env->me_fd, iov, n); if (rc != size) { - n = errno; + n = ErrCode(); if (rc > 0) DPUTS("short write, filesystem full?"); else - DPRINTF("writev: %s", strerror(errno)); + DPRINTF("writev: %s", strerror(n)); mdb_txn_abort(txn); return n; } @@ -1085,15 +1177,15 @@ mdb_txn_commit(MDB_txn *txn) DPRINTF("committing %u dirty pages", n); rc = writev(env->me_fd, iov, n); if (rc != size) { - n = errno; + n = ErrCode(); if (rc > 0) DPUTS("short write, filesystem full?"); else - DPRINTF("writev: %s", strerror(errno)); + DPRINTF("writev: %s", strerror(n)); mdb_txn_abort(txn); return n; } - +#endif } while (!done); /* Drop the dirty pages. @@ -1141,7 +1233,7 @@ done: LAZY_RWLOCK_UNLOCK(&env->me_dblock); } - pthread_mutex_unlock(&env->me_txns->mti_wmutex); + UNLOCK_MUTEX_W(env); free(txn); return MDB_SUCCESS; @@ -1153,20 +1245,25 @@ mdb_env_read_header(MDB_env *env, MDB_meta *meta) char page[PAGESIZE]; MDB_page *p; MDB_meta *m; - int rc; - - assert(env != NULL); + int rc, err; /* We don't know the page size yet, so use a minimum value. */ - if ((rc = pread(env->me_fd, page, PAGESIZE, 0)) == 0) { +#ifdef _WIN32 + if (!ReadFile(env->me_fd, page, PAGESIZE, (DWORD *)&rc, NULL) || rc == 0) +#else + if ((rc = read(env->me_fd, page, PAGESIZE)) == 0) +#endif + { return ENOENT; - } else if (rc != PAGESIZE) { + } + else if (rc != PAGESIZE) { + err = ErrCode(); if (rc > 0) - errno = EINVAL; - DPRINTF("read: %s", strerror(errno)); - return errno; + err = EINVAL; + DPRINTF("read: %s", strerror(err)); + return err; } p = (MDB_page *)page; @@ -1201,7 +1298,8 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta) unsigned int psize; DPUTS("writing new meta page"); - psize = sysconf(_SC_PAGE_SIZE); + + GetPageSize(psize); meta->mm_magic = MDB_MAGIC; meta->mm_version = MDB_VERSION; @@ -1227,9 +1325,18 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta) m = METADATA(q); memcpy(m, meta, sizeof(*meta)); +#ifdef _WIN32 + { + DWORD len; + rc = WriteFile(env->me_fd, p, psize * 2, &len, NULL); + rc = (len == psize * 2) ? MDB_SUCCESS : ErrCode(); + } +#else rc = write(env->me_fd, p, psize * 2); + rc = (rc == (int)psize * 2) ? MDB_SUCCESS : ErrCode(); +#endif free(p); - return (rc == (int)psize * 2) ? MDB_SUCCESS : errno; + return rc; } static int @@ -1240,6 +1347,9 @@ mdb_env_write_meta(MDB_txn *txn) off_t off; int rc, len, toggle; char *ptr; +#ifdef _WIN32 + OVERLAPPED ov; +#endif assert(txn != NULL); assert(txn->mt_env != NULL); @@ -1268,10 +1378,18 @@ mdb_env_write_meta(MDB_txn *txn) off += PAGEHDRSZ; /* Write to the SYNC fd */ +#ifdef _WIN32 + { + memset(&ov, 0, sizeof(ov)); + ov.Offset = off; + WriteFile(env->me_mfd, ptr, len, (DWORD *)&rc, &ov); + } +#else rc = pwrite(env->me_mfd, ptr, len, off); +#endif if (rc != len) { int r2; - rc = errno; + rc = ErrCode(); DPUTS("write failed, disk error?"); /* On a failure, the pagecache still contains the new data. * Write some old data back, to prevent it from being used. @@ -1279,7 +1397,11 @@ mdb_env_write_meta(MDB_txn *txn) */ meta.mm_last_pg = metab.mm_last_pg; meta.mm_txnid = metab.mm_txnid; +#ifdef _WIN32 + WriteFile(env->me_fd, ptr, len, NULL, &ov); +#else r2 = pwrite(env->me_fd, ptr, len, off); +#endif env->me_flags |= MDB_FATAL_ERROR; return rc; } @@ -1323,9 +1445,9 @@ mdb_env_create(MDB_env **env) e->me_maxreaders = DEFAULT_READERS; e->me_maxdbs = 2; - e->me_fd = -1; - e->me_lfd = -1; - e->me_mfd = -1; + e->me_fd = INVALID_HANDLE_VALUE; + e->me_lfd = INVALID_HANDLE_VALUE; + e->me_mfd = INVALID_HANDLE_VALUE; *env = e; return MDB_SUCCESS; } @@ -1388,13 +1510,41 @@ mdb_env_open2(MDB_env *env, unsigned int flags) env->me_mapsize = newenv ? DEFAULT_MAPSIZE : meta.mm_mapsize; } +#ifdef _WIN32 + { + HANDLE mh; + LONG sizelo, sizehi; + sizelo = env->me_mapsize & 0xffffffff; + sizehi = env->me_mapsize >> 16; /* pointless on WIN32, only needed on W64 */ + sizehi >>= 16; + /* Windows won't create mappings for zero length files. + * Just allocate the maxsize right now. + */ + if (newenv) { + SetFilePointer(env->me_fd, sizelo, sizehi ? &sizehi : NULL, 0); + if (!SetEndOfFile(env->me_fd)) + return ErrCode(); + SetFilePointer(env->me_fd, 0, NULL, 0); + } + mh = CreateFileMapping(env->me_fd, NULL, PAGE_READONLY, + sizehi, sizelo, NULL); + if (!mh) + return ErrCode(); + env->me_map = MapViewOfFileEx(mh, FILE_MAP_READ, 0, 0, env->me_mapsize, + meta.mm_address); + CloseHandle(mh); + if (!env->me_map) + return ErrCode(); + } +#else i = MAP_SHARED; if (meta.mm_address && (flags & MDB_FIXEDMAP)) i |= MAP_FIXED; env->me_map = mmap(meta.mm_address, env->me_mapsize, PROT_READ, i, env->me_fd, 0); if (env->me_map == MAP_FAILED) - return errno; + return ErrCode(); +#endif if (newenv) { meta.mm_mapsize = env->me_mapsize; @@ -1429,6 +1579,8 @@ mdb_env_open2(MDB_env *env, unsigned int flags) return MDB_SUCCESS; } +#ifndef _WIN32 +/* Windows doesn't support destructor callbacks for thread-specific storage */ static void mdb_env_reader_dest(void *ptr) { @@ -1438,12 +1590,12 @@ mdb_env_reader_dest(void *ptr) reader->mr_pid = 0; reader->mr_tid = 0; } +#endif /* downgrade the exclusive lock on the region back to shared */ static void mdb_env_share_locks(MDB_env *env) { - struct flock lock_info; int toggle = 0; if (env->me_metas[0]->mm_txnid < env->me_metas[1]->mm_txnid) @@ -1451,12 +1603,28 @@ mdb_env_share_locks(MDB_env *env) env->me_txns->mti_me_toggle = toggle; env->me_txns->mti_txnid = env->me_metas[toggle]->mm_txnid; - memset((void *)&lock_info, 0, sizeof(lock_info)); - lock_info.l_type = F_RDLCK; - lock_info.l_whence = SEEK_SET; - lock_info.l_start = 0; - lock_info.l_len = 1; - fcntl(env->me_lfd, F_SETLK, &lock_info); +#ifdef _WIN32 + { + OVERLAPPED ov; + /* First acquire a shared lock. The Unlock will + * then release the existing exclusive lock. + */ + memset(&ov, 0, sizeof(ov)); + LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov); + UnlockFile(env->me_lfd, 0, 0, 1, 0); + } +#else + { + struct flock lock_info; + /* The shared lock replaces the existing lock */ + memset((void *)&lock_info, 0, sizeof(lock_info)); + lock_info.l_type = F_RDLCK; + lock_info.l_whence = SEEK_SET; + lock_info.l_start = 0; + lock_info.l_len = 1; + fcntl(env->me_lfd, F_SETLK, &lock_info); + } +#endif } static int @@ -1464,52 +1632,138 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) { int rc; off_t size, rsize; - struct flock lock_info; *excl = 0; +#ifdef _WIN32 + if ((env->me_lfd = CreateFile(lpath, GENERIC_READ|GENERIC_WRITE, + FILE_SHARE_READ|FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, + FILE_ATTRIBUTE_NORMAL, NULL)) == INVALID_HANDLE_VALUE) { + rc = ErrCode(); + return rc; + } + /* Try to get exclusive lock. If we succeed, then + * nobody is using the lock region and we should initialize it. + */ + { + if (LockFile(env->me_lfd, 0, 0, 1, 0)) { + *excl = 1; + } else { + OVERLAPPED ov; + memset(&ov, 0, sizeof(ov)); + if (!LockFileEx(env->me_lfd, 0, 0, 1, 0, &ov)) { + rc = ErrCode(); + goto fail; + } + } + } + size = GetFileSize(env->me_lfd, NULL); +#else if ((env->me_lfd = open(lpath, O_RDWR|O_CREAT, mode)) == -1) { - rc = errno; + rc = ErrCode(); return rc; } /* Try to get exclusive lock. If we succeed, then * nobody is using the lock region and we should initialize it. */ - memset((void *)&lock_info, 0, sizeof(lock_info)); - lock_info.l_type = F_WRLCK; - lock_info.l_whence = SEEK_SET; - lock_info.l_start = 0; - lock_info.l_len = 1; - rc = fcntl(env->me_lfd, F_SETLK, &lock_info); - if (rc == 0) { - *excl = 1; - } else { - lock_info.l_type = F_RDLCK; + { + struct flock lock_info; + memset((void *)&lock_info, 0, sizeof(lock_info)); + lock_info.l_type = F_WRLCK; + lock_info.l_whence = SEEK_SET; + lock_info.l_start = 0; + lock_info.l_len = 1; rc = fcntl(env->me_lfd, F_SETLK, &lock_info); - if (rc) { - rc = errno; - goto fail; + if (rc == 0) { + *excl = 1; + } else { + lock_info.l_type = F_RDLCK; + rc = fcntl(env->me_lfd, F_SETLKW, &lock_info); + if (rc) { + rc = ErrCode(); + goto fail; + } } } size = lseek(env->me_lfd, 0, SEEK_END); +#endif rsize = (env->me_maxreaders-1) * sizeof(MDB_reader) + sizeof(MDB_txninfo); if (size < rsize && *excl) { +#ifdef _WIN32 + SetFilePointer(env->me_lfd, rsize, NULL, 0); + if (!SetEndOfFile(env->me_lfd)) { + rc = ErrCode(); + goto fail; + } +#else if (ftruncate(env->me_lfd, rsize) != 0) { - rc = errno; + rc = ErrCode(); goto fail; } +#endif } else { rsize = size; size = rsize - sizeof(MDB_txninfo); env->me_maxreaders = size/sizeof(MDB_reader) + 1; } +#ifdef _WIN32 + { + HANDLE mh; + mh = CreateFileMapping(env->me_lfd, NULL, PAGE_READWRITE, + 0, 0, NULL); + if (!mh) { + rc = ErrCode(); + goto fail; + } + env->me_txns = MapViewOfFileEx(mh, FILE_MAP_WRITE, 0, 0, rsize, NULL); + CloseHandle(mh); + if (!env->me_txns) { + rc = ErrCode(); + goto fail; + } + } +#else env->me_txns = mmap(0, rsize, PROT_READ|PROT_WRITE, MAP_SHARED, env->me_lfd, 0); if (env->me_txns == MAP_FAILED) { - rc = errno; + rc = ErrCode(); goto fail; } +#endif if (*excl) { +#ifdef _WIN32 + char *ptr; + if (!mdb_sec_inited) { + InitializeSecurityDescriptor(&mdb_null_sd, + SECURITY_DESCRIPTOR_REVISION); + SetSecurityDescriptorDacl(&mdb_null_sd, TRUE, 0, FALSE); + mdb_all_sa.nLength = sizeof(SECURITY_ATTRIBUTES); + mdb_all_sa.bInheritHandle = FALSE; + mdb_all_sa.lpSecurityDescriptor = &mdb_null_sd; + mdb_sec_inited = 1; + } + /* FIXME: only using up to 20 characters of the env path here, + * probably not enough to assure uniqueness... + */ + sprintf(env->me_txns->mti_rmname, "Global\\MDBr%.20s", lpath); + ptr = env->me_txns->mti_rmname + sizeof("Global\\MDBr"); + while ((ptr = strchr(ptr, '\\'))) + *ptr++ = '/'; + env->me_rmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname); + if (!env->me_rmutex) { + rc = ErrCode(); + goto fail; + } + sprintf(env->me_txns->mti_rmname, "Global\\MDBw%.20s", lpath); + ptr = env->me_txns->mti_rmname + sizeof("Global\\MDBw"); + while ((ptr = strchr(ptr, '\\'))) + *ptr++ = '/'; + env->me_wmutex = CreateMutex(&mdb_all_sa, FALSE, env->me_txns->mti_rmname); + if (!env->me_wmutex) { + rc = ErrCode(); + goto fail; + } +#else pthread_mutexattr_t mattr; pthread_mutexattr_init(&mattr); @@ -1519,6 +1773,7 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) } pthread_mutex_init(&env->me_txns->mti_mutex, &mattr); pthread_mutex_init(&env->me_txns->mti_wmutex, &mattr); +#endif env->me_txns->mti_version = MDB_VERSION; env->me_txns->mti_magic = MDB_MAGIC; env->me_txns->mti_txnid = 0; @@ -1537,16 +1792,28 @@ mdb_env_setup_locks(MDB_env *env, char *lpath, int mode, int *excl) rc = MDB_VERSION_MISMATCH; goto fail; } - if (errno != EACCES && errno != EAGAIN) { - rc = errno; + rc = ErrCode(); + if (rc != EACCES && rc != EAGAIN) { goto fail; } +#ifdef _WIN32 + env->me_rmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_rmname); + if (!env->me_rmutex) { + rc = ErrCode(); + goto fail; + } + env->me_wmutex = OpenMutex(SYNCHRONIZE, FALSE, env->me_txns->mti_wmname); + if (!env->me_wmutex) { + rc = ErrCode(); + goto fail; + } +#endif } return MDB_SUCCESS; fail: close(env->me_lfd); - env->me_lfd = -1; + env->me_lfd = INVALID_HANDLE_VALUE; return rc; } @@ -1571,25 +1838,50 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode) if (rc) goto leave; +#ifdef _WIN32 + if (F_ISSET(flags, MDB_RDONLY)) { + oflags = GENERIC_READ; + len = OPEN_EXISTING; + } else { + oflags = GENERIC_READ|GENERIC_WRITE; + len = OPEN_ALWAYS; + } + mode = FILE_ATTRIBUTE_NORMAL; + if ((env->me_fd = CreateFile(dpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, + NULL, len, mode, NULL)) == INVALID_HANDLE_VALUE) { + rc = ErrCode(); + goto leave; + } +#else if (F_ISSET(flags, MDB_RDONLY)) oflags = O_RDONLY; else oflags = O_RDWR | O_CREAT; if ((env->me_fd = open(dpath, oflags, mode)) == -1) { - rc = errno; + rc = ErrCode(); goto leave; } +#endif if ((rc = mdb_env_open2(env, flags)) == MDB_SUCCESS) { /* synchronous fd for meta writes */ +#ifdef _WIN32 + if (!(flags & (MDB_RDONLY|MDB_NOSYNC))) + mode |= FILE_FLAG_WRITE_THROUGH; + if ((env->me_mfd = CreateFile(dpath, oflags, FILE_SHARE_READ|FILE_SHARE_WRITE, + NULL, len, mode, NULL)) == INVALID_HANDLE_VALUE) { + rc = ErrCode(); + goto leave; + } +#else if (!(flags & (MDB_RDONLY|MDB_NOSYNC))) oflags |= MDB_DSYNC; if ((env->me_mfd = open(dpath, oflags, mode)) == -1) { - rc = errno; + rc = ErrCode(); goto leave; } - +#endif env->me_path = strdup(path); DPRINTF("opened dbenv %p", (void *) env); pthread_key_create(&env->me_txkey, mdb_env_reader_dest); @@ -1604,13 +1896,13 @@ mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode) leave: if (rc) { - if (env->me_fd >= 0) { + if (env->me_fd != INVALID_HANDLE_VALUE) { close(env->me_fd); - env->me_fd = -1; + env->me_fd = INVALID_HANDLE_VALUE; } - if (env->me_lfd >= 0) { + if (env->me_lfd != INVALID_HANDLE_VALUE) { close(env->me_lfd); - env->me_lfd = -1; + env->me_lfd = INVALID_HANDLE_VALUE; } } free(lpath); @@ -1646,12 +1938,11 @@ mdb_env_close(MDB_env *env) close(env->me_fd); if (env->me_txns) { pid_t pid = getpid(); - size_t size = (env->me_maxreaders-1) * sizeof(MDB_reader) + sizeof(MDB_txninfo); unsigned int i; for (i=0; ime_txns->mti_numreaders; i++) if (env->me_txns->mti_readers[i].mr_pid == pid) env->me_txns->mti_readers[i].mr_pid = 0; - munmap(env->me_txns, size); + munmap(env->me_txns, (env->me_maxreaders-1)*sizeof(MDB_reader)+sizeof(MDB_txninfo)); } close(env->me_lfd); free(env); -- 2.39.2