| /* Copyright 2012, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived |
| * from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <stdbool.h> |
| |
| #include "big_lock.h" |
| #include "ipc_lock.h" |
| #include "flash.h" |
| |
| #define LOCKFILE_NAME "firmware_utility_lock" |
| static struct ipc_lock big_lock = LOCKFILE_INIT(LOCKFILE_NAME); |
| /** Big lock acquisition status. */ |
| static bool g_big_lock_acquired = false; |
| |
| int acquire_big_lock(int timeout_secs) |
| { |
| msg_gdbg("Acquiring lock (timeout=%d sec)...\n", timeout_secs); |
| int ret = acquire_lock(&big_lock, timeout_secs * 1000); |
| if (ret < 0) { |
| msg_gerr("Could not acquire lock.\n"); |
| } else { |
| g_big_lock_acquired = true; |
| msg_gdbg("Lock acquired.\n"); |
| } |
| return ret; |
| } |
| |
| int release_big_lock(void) |
| { |
| int ret = 0; |
| if (g_big_lock_acquired) { |
| ret = release_lock(&big_lock); |
| g_big_lock_acquired = false; |
| } |
| return ret; |
| } |