added SuperH atomic support to libcutils
This commit is contained in:
Shin-ichiro KAWASAKI
Tony Sim
parent
1f7aceb222
commit
c6af9114fc
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@ -0,0 +1,327 @@
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/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Android config -- "android-sh". Used for SuperH device builds.
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*/
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#ifndef _ANDROID_CONFIG_H
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#define _ANDROID_CONFIG_H
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/*
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* ===========================================================================
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* !!! IMPORTANT !!!
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* ===========================================================================
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*
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* This file is included by ALL C/C++ source files. Don't put anything in
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* here unless you are absolutely certain it can't go anywhere else.
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*
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* Any C++ stuff must be wrapped with "#ifdef __cplusplus". Do not use "//"
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* comments.
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*/
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/*
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* Threading model. Choose one:
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*
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* HAVE_PTHREADS - use the pthreads library.
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* HAVE_WIN32_THREADS - use Win32 thread primitives.
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* -- combine HAVE_CREATETHREAD, HAVE_CREATEMUTEX, and HAVE__BEGINTHREADEX
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*/
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#define HAVE_PTHREADS
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/*
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* Do we have the futex syscall?
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*/
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#define HAVE_FUTEX
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/*
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* Define if we already have the futex wrapper functions defined. Yes if
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* compiling against bionic.
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*/
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#define HAVE_FUTEX_WRAPPERS 1
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/*
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* Process creation model. Choose one:
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*
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* HAVE_FORKEXEC - use fork() and exec()
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* HAVE_WIN32_PROC - use CreateProcess()
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*/
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#define HAVE_FORKEXEC
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/*
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* Process out-of-memory adjustment. Set if running on Linux,
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* where we can write to /proc/<pid>/oom_adj to modify the out-of-memory
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* badness adjustment.
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*/
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#define HAVE_OOM_ADJ
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/*
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* IPC model. Choose one:
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*
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* HAVE_SYSV_IPC - use the classic SysV IPC mechanisms (semget, shmget).
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* HAVE_MACOSX_IPC - use Macintosh IPC mechanisms (sem_open, mmap).
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* HAVE_WIN32_IPC - use Win32 IPC (CreateSemaphore, CreateFileMapping).
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* HAVE_ANDROID_IPC - use Android versions (?, mmap).
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*/
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#define HAVE_ANDROID_IPC
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/*
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* Memory-mapping model. Choose one:
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*
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* HAVE_POSIX_FILEMAP - use the Posix sys/mmap.h
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* HAVE_WIN32_FILEMAP - use Win32 filemaps
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*/
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#define HAVE_POSIX_FILEMAP
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/*
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* Define this if you have <termio.h>
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*/
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#define HAVE_TERMIO_H
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/*
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* Define this if you build against MSVCRT.DLL
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*/
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/* #define HAVE_MS_C_RUNTIME */
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/*
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* Define this if you have sys/uio.h
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*/
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#define HAVE_SYS_UIO_H
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/*
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* Define this if your platforms implements symbolic links
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* in its filesystems
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*/
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#define HAVE_SYMLINKS
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/*
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* Define this if we have localtime_r().
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*/
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/* #define HAVE_LOCALTIME_R */
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/*
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* Define this if we have gethostbyname_r().
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*/
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/* #define HAVE_GETHOSTBYNAME_R */
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/*
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* Define this if we have ioctl().
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*/
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#define HAVE_IOCTL
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/*
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* Define this if we want to use WinSock.
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*/
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/* #define HAVE_WINSOCK */
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/*
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* Define this if have clock_gettime() and friends
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*/
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#define HAVE_POSIX_CLOCKS
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/*
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* Define this if we have pthread_cond_timedwait_monotonic() and
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* clock_gettime(CLOCK_MONOTONIC).
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*/
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/* #define HAVE_TIMEDWAIT_MONOTONIC */
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/*
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* Define this if we have linux style epoll()
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*/
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#define HAVE_EPOLL
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/*
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* Endianness of the target machine. Choose one:
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*
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* HAVE_ENDIAN_H -- have endian.h header we can include.
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* HAVE_LITTLE_ENDIAN -- we are little endian.
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* HAVE_BIG_ENDIAN -- we are big endian.
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*/
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#define HAVE_ENDIAN_H
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#define HAVE_LITTLE_ENDIAN
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/*
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* We need to choose between 32-bit and 64-bit off_t. All of our code should
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* agree on the same size. For desktop systems, use 64-bit values,
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* because some of our libraries (e.g. wxWidgets) expect to be built that way.
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*/
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/* #define _FILE_OFFSET_BITS 64 */
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/* #define _LARGEFILE_SOURCE 1 */
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/*
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* Defined if we have the backtrace() call for retrieving a stack trace.
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* Needed for CallStack to operate; if not defined, CallStack is
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* non-functional.
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*/
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#define HAVE_BACKTRACE 0
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/*
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* Defined if we have the dladdr() call for retrieving the symbol associated
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* with a memory address. If not defined, stack crawls will not have symbolic
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* information.
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*/
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#define HAVE_DLADDR 0
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/*
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* Defined if we have the cxxabi.h header for demangling C++ symbols. If
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* not defined, stack crawls will be displayed with raw mangled symbols
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*/
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#define HAVE_CXXABI 0
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/*
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* Defined if we have the gettid() system call.
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*/
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#define HAVE_GETTID
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/*
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* Defined if we have the sched_setscheduler() call
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*/
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#define HAVE_SCHED_SETSCHEDULER
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/*
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* Add any extra platform-specific defines here.
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*/
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/* #define __linux__ */ /* for SuperH */
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/*
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* Define if we have <malloc.h> header
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*/
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#define HAVE_MALLOC_H
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/*
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* Define if we're running on *our* linux on device or emulator.
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*/
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#define HAVE_ANDROID_OS 1
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/*
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* Define if we have Linux-style non-filesystem Unix Domain Sockets
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*/
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#define HAVE_LINUX_LOCAL_SOCKET_NAMESPACE 1
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/*
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* Define if we have Linux's inotify in <sys/inotify.h>.
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*/
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#define HAVE_INOTIFY 1
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/*
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* Define if we have madvise() in <sys/mman.h>
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*/
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#define HAVE_MADVISE 1
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/*
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* Define if tm struct has tm_gmtoff field
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*/
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#define HAVE_TM_GMTOFF 1
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/*
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* Define if dirent struct has d_type field
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*/
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#define HAVE_DIRENT_D_TYPE 1
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/*
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* Define if libc includes Android system properties implementation.
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*/
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#define HAVE_LIBC_SYSTEM_PROPERTIES 1
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/*
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* Define if system provides a system property server (should be
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* mutually exclusive with HAVE_LIBC_SYSTEM_PROPERTIES).
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*/
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/* #define HAVE_SYSTEM_PROPERTY_SERVER */
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/*
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* What CPU architecture does this platform use?
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*/
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#define ARCH_SH
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/*
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* Define if the size of enums is as short as possible,
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*/
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/* #define HAVE_SHORT_ENUMS */
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/*
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* sprintf() format string for shared library naming.
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*/
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#define OS_SHARED_LIB_FORMAT_STR "lib%s.so"
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/*
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* Do we have __memcmp16()?
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*
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* TODO : Investigate the perfomance impact of __memcmp16()
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* and implement it.
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* This influences on dalvikVM's string performance.
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* See dalvik/vm/InlineNative.c.
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*/
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/* #define HAVE__MEMCMP16 */
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/*
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* type for the third argument to mincore().
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*/
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#define MINCORE_POINTER_TYPE unsigned char *
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/*
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* Do we have the sigaction flag SA_NOCLDWAIT?
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*/
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#define HAVE_SA_NOCLDWAIT
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/*
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* The default path separator for the platform
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*/
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#define OS_PATH_SEPARATOR '/'
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/*
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* Is the filesystem case sensitive?
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*/
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#define OS_CASE_SENSITIVE
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/*
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* Define if <sys/socket.h> exists.
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*/
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#define HAVE_SYS_SOCKET_H 1
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/*
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* Define if the strlcpy() function exists on the system.
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*/
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#define HAVE_STRLCPY 1
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/*
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* Define if prctl() exists
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*/
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#define HAVE_PRCTL 1
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/*
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* Define if writev() exists
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*/
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#define HAVE_WRITEV 1
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/*
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* For dalvik/libcore
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*/
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#define CANT_PASS_VALIST_AS_CHARPTR
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/*
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* For external/bluez/utils/tools/hciattach.c
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* TODO : This definition should be somewhere in bionic/libc/kernel/(*).
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* Cosider the place and move it there.
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*/
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#define N_TTY 0
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/*
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* Whether or not _Unwind_Context is defined as a struct.
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*/
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#define HAVE_UNWIND_CONTEXT_STRUCT
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#endif /* _ANDROID_CONFIG_H */
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@ -98,7 +98,11 @@ LOCAL_SRC_FILES := $(commonSources) ashmem-dev.c mq.c
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ifeq ($(TARGET_ARCH),arm)
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LOCAL_SRC_FILES += memset32.S atomic-android-arm.S
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else # !arm
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ifeq ($(TARGET_ARCH),sh)
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LOCAL_SRC_FILES += memory.c atomic-android-sh.c
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else # !sh
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LOCAL_SRC_FILES += memory.c
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endif # !sh
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endif # !arm
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LOCAL_C_INCLUDES := $(KERNEL_HEADERS)
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@ -0,0 +1,159 @@
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/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <cutils/atomic.h>
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#ifdef HAVE_WIN32_THREADS
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#include <windows.h>
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#else
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#include <sched.h>
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#endif
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/*
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* Note :
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*
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* (1) SuperH does not have CMPXCHG. It has only TAS for atomic
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* operations. It does not seem a good idea to implement CMPXCHG,
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* with TAS. So, we choose to implemnt these operations with
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* posix mutexes. Please be sure that this might cause performance
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* problem for Android-SH. Using LL/SC instructions supported in SH-X3,
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* best performnace would be realized.
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*
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* (2) Mutex initialization problem happens, which is commented for
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* ARM implementation, in this file above.
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* We follow the fact that the initializer for mutex is a simple zero
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* value.
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*/
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#include <pthread.h>
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#define SWAP_LOCK_COUNT 32U
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static pthread_mutex_t _swap_locks[SWAP_LOCK_COUNT];
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#define SWAP_LOCK(addr) \
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&_swap_locks[((unsigned)(void*)(addr) >> 3U) % SWAP_LOCK_COUNT]
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void android_atomic_write(int32_t value, volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, value, addr));
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}
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int32_t android_atomic_inc(volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, oldValue+1, addr));
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return oldValue;
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}
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int32_t android_atomic_dec(volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, oldValue-1, addr));
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return oldValue;
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}
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int32_t android_atomic_add(int32_t value, volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, oldValue+value, addr));
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return oldValue;
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}
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int32_t android_atomic_and(int32_t value, volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, oldValue&value, addr));
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return oldValue;
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}
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int32_t android_atomic_or(int32_t value, volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, oldValue|value, addr));
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return oldValue;
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}
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int32_t android_atomic_swap(int32_t value, volatile int32_t* addr) {
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int32_t oldValue;
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do {
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oldValue = *addr;
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} while (android_atomic_cmpxchg(oldValue, value, addr));
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return oldValue;
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}
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int android_atomic_cmpxchg(int32_t oldvalue, int32_t newvalue,
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volatile int32_t* addr) {
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int result;
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pthread_mutex_t* lock = SWAP_LOCK(addr);
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pthread_mutex_lock(lock);
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if (*addr == oldvalue) {
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*addr = newvalue;
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result = 0;
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} else {
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result = 1;
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}
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pthread_mutex_unlock(lock);
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return result;
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}
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int64_t android_quasiatomic_swap_64(int64_t value, volatile int64_t* addr) {
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int64_t oldValue;
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pthread_mutex_t* lock = SWAP_LOCK(addr);
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pthread_mutex_lock(lock);
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oldValue = *addr;
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*addr = value;
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pthread_mutex_unlock(lock);
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return oldValue;
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}
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int android_quasiatomic_cmpxchg_64(int64_t oldvalue, int64_t newvalue,
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volatile int64_t* addr) {
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int result;
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pthread_mutex_t* lock = SWAP_LOCK(addr);
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pthread_mutex_lock(lock);
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if (*addr == oldvalue) {
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*addr = newvalue;
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result = 0;
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} else {
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result = 1;
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}
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pthread_mutex_unlock(lock);
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return result;
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}
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int64_t android_quasiatomic_read_64(volatile int64_t* addr) {
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int64_t result;
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pthread_mutex_t* lock = SWAP_LOCK(addr);
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pthread_mutex_lock(lock);
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result = *addr;
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pthread_mutex_unlock(lock);
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return result;
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}
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@ -245,6 +245,10 @@ int64_t android_quasiatomic_read_64(volatile int64_t* addr) {
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return result;
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}
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/*****************************************************************************/
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#elif __sh__
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// implementation for SuperH is in atomic-android-sh.c.
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#else
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#error "Unsupported atomic operations for this platform"
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