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author | 2015-11-30 01:45:08 -0500 | |
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committer | 2015-11-30 01:45:08 -0500 | |
commit | e8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch) | |
tree | aa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c | |
parent | cc40af334e619bb549038238507407866f774f8f (diff) |
upload http
JIRA: BOTTLENECK-10
Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da
Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c')
-rw-r--r-- | rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c b/rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c new file mode 100644 index 00000000..e08e08a7 --- /dev/null +++ b/rubbos/app/httpd-2.0.64/srclib/apr/file_io/win32/flock.c @@ -0,0 +1,86 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "apr_arch_file_io.h" + +APR_DECLARE(apr_status_t) apr_file_lock(apr_file_t *thefile, int type) +{ +#ifdef _WIN32_WCE + /* The File locking is unsuported on WCE */ + return APR_ENOTIMPL; +#else + const DWORD len = 0xffffffff; + DWORD flags; + + flags = ((type & APR_FLOCK_NONBLOCK) ? LOCKFILE_FAIL_IMMEDIATELY : 0) + + (((type & APR_FLOCK_TYPEMASK) == APR_FLOCK_SHARED) + ? 0 : LOCKFILE_EXCLUSIVE_LOCK); + if (apr_os_level >= APR_WIN_NT) { + /* Syntax is correct, len is passed for LengthLow and LengthHigh*/ + OVERLAPPED offset; + memset (&offset, 0, sizeof(offset)); + if (!LockFileEx(thefile->filehand, flags, 0, len, len, &offset)) + return apr_get_os_error(); + } + else { + /* On Win9x, LockFile() never blocks. Hack in a crufty poll. + * + * Note that this hack exposes threads to being unserviced forever, + * in the situation that the given lock has low availability. + * When implemented in the kernel, LockFile will typically use + * FIFO or round robin distribution to ensure all threads get + * one crack at the lock; but in this case we can't emulate that. + * + * However Win9x are barely maintainable anyways, if the user does + * choose to build to them, this is the best we can do. + */ + while (!LockFile(thefile->filehand, 0, 0, len, 0)) { + DWORD err = GetLastError(); + if ((err == ERROR_LOCK_VIOLATION) && !(type & APR_FLOCK_NONBLOCK)) + { + Sleep(500); /* pause for a half second */ + continue; /* ... and then poll again */ + } + return APR_FROM_OS_ERROR(err); + } + } + + return APR_SUCCESS; +#endif /* !defined(_WIN32_WCE) */ +} + +APR_DECLARE(apr_status_t) apr_file_unlock(apr_file_t *thefile) +{ +#ifdef _WIN32_WCE + return APR_ENOTIMPL; +#else + DWORD len = 0xffffffff; + + if (apr_os_level >= APR_WIN_NT) { + /* Syntax is correct, len is passed for LengthLow and LengthHigh*/ + OVERLAPPED offset; + memset (&offset, 0, sizeof(offset)); + if (!UnlockFileEx(thefile->filehand, 0, len, len, &offset)) + return apr_get_os_error(); + } + else { + if (!UnlockFile(thefile->filehand, 0, 0, len, 0)) + return apr_get_os_error(); + } + + return APR_SUCCESS; +#endif /* !defined(_WIN32_WCE) */ +} |