| /** |
| * 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 <sys/types.h> |
| #include "ThreadingUtil.h" |
| #include "LibCSymTable.h" |
| |
| #ifdef THREADED |
| |
| // **************************************************************************** |
| // Mutex wrapper |
| struct Mutex::Impl{ |
| Impl(){ |
| LIBC_SYMBOLS.pthread_mutex_init(&mut_, 0); |
| } |
| ~Impl(){ |
| LIBC_SYMBOLS.pthread_mutex_destroy(&mut_); |
| } |
| pthread_mutex_t mut_; |
| }; |
| |
| Mutex::Mutex():impl_(new Impl) {} |
| Mutex::~Mutex() { delete impl_;} |
| void Mutex::acquire() { |
| LIBC_SYMBOLS.pthread_mutex_lock(&impl_->mut_); |
| } |
| void Mutex::release() { |
| LIBC_SYMBOLS.pthread_mutex_unlock(&impl_->mut_); |
| } |
| |
| // **************************************************************************** |
| // Atomics |
| int32_t atomic_post_incr(volatile int32_t* operand, int32_t incr) |
| { |
| int32_t result; |
| __asm__ __volatile__( |
| "lock xaddl %0,%1\n" |
| : "=r"(result), "=m"(*operand) |
| : "0"(incr) |
| : "memory"); |
| return result; |
| } |
| int32_t atomic_fetch_store(volatile int32_t *ptr, int32_t value) |
| { |
| int32_t result; |
| __asm__ __volatile__("lock xchgl %0,%1\n" |
| : "=r"(result), "=m"(*ptr) |
| : "0"(value) |
| : "memory"); |
| return result; |
| } |
| #else |
| int32_t atomic_post_incr(volatile int32_t* operand, int32_t incr){ |
| int32_t v=*operand; |
| *operand+=incr; |
| return v; |
| } |
| int32_t atomic_fetch_store(volatile int32_t *ptr, int32_t value) |
| { |
| int32_t result=*ptr; |
| *ptr=value; |
| return result; |
| } |
| #endif // THREADED |