/* 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 #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; }