Return-Path: From: Andrei Emeltchenko To: linux-bluetooth@vger.kernel.org Subject: [RFC 1/2] android: Add thread-safe helpers Date: Mon, 28 Oct 2013 16:06:50 +0200 Message-Id: <1382969211-7402-2-git-send-email-Andrei.Emeltchenko.news@gmail.com> In-Reply-To: <1382969211-7402-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> References: <1382969211-7402-1-git-send-email-Andrei.Emeltchenko.news@gmail.com> Sender: linux-bluetooth-owner@vger.kernel.org List-ID: From: Andrei Emeltchenko Add thread safe helpers to make HAL debug printing thread-safe. The code is inherited from Android bionic and it is used for strerror, strsignal, etc. --- android/pthread-local.h | 51 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 android/pthread-local.h diff --git a/android/pthread-local.h b/android/pthread-local.h new file mode 100644 index 0000000..07012f3 --- /dev/null +++ b/android/pthread-local.h @@ -0,0 +1,51 @@ +/* + * Copyright (C) 2012 The Android Open Source Project + * Copyright (C) 2013 Intel Corp. + * + * 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. + * + * 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 + +#define GLOBAL_INIT_THREAD_LOCAL_BUFFER(name) \ + static pthread_key_t __bionic_tls_ ## name ## _key; \ + static void __bionic_tls_ ## name ## _key_destroy(void* buffer) { \ + free(buffer); \ + } \ + __attribute__((constructor)) static void __bionic_tls_ ## name ## _key_init() { \ + pthread_key_create(&__bionic_tls_ ## name ## _key, __bionic_tls_ ## name ## _key_destroy); \ + } + +// Leaves "name_tls_buffer" and "name_tls_buffer_size" defined and initialized. +#define LOCAL_INIT_THREAD_LOCAL_BUFFER(type, name, byte_count) \ + type name ## _tls_buffer = \ + (pthread_getspecific(__bionic_tls_ ## name ## _key)); \ + if (name ## _tls_buffer == NULL) { \ + name ## _tls_buffer = (calloc(1, byte_count)); \ + pthread_setspecific(__bionic_tls_ ## name ## _key, name ## _tls_buffer); \ + } \ + const size_t name ## _tls_buffer_size __attribute__((unused)) = byte_count -- 1.7.10.4