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/********************* */
/*! \file tls.h.in
** \verbatim
** Original author: ACSYS <cvc4-devel@cs.nyu.edu>
** Major contributors: Morgan Deters <mdeters@cs.nyu.edu>
** Minor contributors (to current version): none
** This file is part of the CVC4 project.
** Copyright (c) 2009-2013 New York University and The University of Iowa
** See the file COPYING in the top-level source directory for licensing
** information.\endverbatim
**
** \brief Header to define CVC4_THREAD whether or not TLS is
** supported by the compiler/runtime platform
**
** Header to define CVC4_THREAD whether or not TLS is supported by
** the compiler/runtime platform. If not, an implementation based on
** pthread_getspecific() / pthread_setspecific() is given.
**/
#include "cvc4_public.h"
#ifndef __CVC4__TLS_H
#define __CVC4__TLS_H
// A bit obnoxious: we have to take varargs to support multi-argument
// template types in the threadlocals.
// E.g. "CVC4_THREADLOCAL(hash_set<type, hasher>*)" fails otherwise,
// due to the embedded comma.
#if @CVC4_TLS_SUPPORTED@
# define CVC4_THREADLOCAL(__type...) @CVC4_TLS@ __type
# define CVC4_THREADLOCAL_PUBLIC(__type...) @CVC4_TLS@ CVC4_PUBLIC __type
# define CVC4_THREADLOCAL_TYPE(__type...) __type
#else
# include <pthread.h>
# define CVC4_THREADLOCAL(__type...) ::CVC4::ThreadLocal< __type >
# define CVC4_THREADLOCAL_PUBLIC(__type...) CVC4_PUBLIC ::CVC4::ThreadLocal< __type >
# define CVC4_THREADLOCAL_TYPE(__type...) ::CVC4::ThreadLocal< __type >
namespace CVC4 {
template <class T, bool small>
class ThreadLocalImpl;
template <class T>
class ThreadLocalImpl<T, true> {
pthread_key_t d_key;
static void cleanup(void*) {
}
public:
ThreadLocalImpl() {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
}
ThreadLocalImpl(const T& t) {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(t)));
}
ThreadLocalImpl(const ThreadLocalImpl& tl) {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(static_cast<const T&>(tl))));
}
ThreadLocalImpl& operator=(const T& t) {
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(t)));
return *this;
}
ThreadLocalImpl& operator=(const ThreadLocalImpl& tl) {
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(static_cast<const T&>(tl))));
return *this;
}
operator T() const {
return static_cast<T>(reinterpret_cast<size_t>(pthread_getspecific(d_key)));
}
};/* class ThreadLocalImpl<T, true> */
template <class T>
class ThreadLocalImpl<T*, true> {
pthread_key_t d_key;
static void cleanup(void*) {
}
public:
ThreadLocalImpl() {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
}
ThreadLocalImpl(const T* t) {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(t)));
}
ThreadLocalImpl(const ThreadLocalImpl& tl) {
pthread_key_create(&d_key, ThreadLocalImpl::cleanup);
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(static_cast<const T*>(tl))));
}
ThreadLocalImpl& operator=(const T* t) {
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(t)));
return *this;
}
ThreadLocalImpl& operator=(const ThreadLocalImpl& tl) {
pthread_setspecific(d_key, const_cast<void*>(reinterpret_cast<const void*>(static_cast<const T*>(tl))));
return *this;
}
operator T*() const {
return static_cast<T*>(pthread_getspecific(d_key));
}
T operator*() {
return *static_cast<T*>(pthread_getspecific(d_key));
}
T* operator->() {
return static_cast<T*>(pthread_getspecific(d_key));
}
};/* class ThreadLocalImpl<T*, true> */
template <class T>
class ThreadLocalImpl<T, false> {
};/* class ThreadLocalImpl<T, false> */
template <class T>
class ThreadLocal : public ThreadLocalImpl<T, sizeof(T) <= sizeof(void*)> {
typedef ThreadLocalImpl<T, sizeof(T) <= sizeof(void*)> super;
public:
ThreadLocal() : super() {}
ThreadLocal(const T& t) : super(t) {}
ThreadLocal(const ThreadLocal<T>& tl) : super(tl) {}
ThreadLocal<T>& operator=(const T& t) {
return static_cast< ThreadLocal<T>& >(super::operator=(t));
}
ThreadLocal<T>& operator=(const ThreadLocal<T>& tl) {
return static_cast< ThreadLocal<T>& >(super::operator=(tl));
}
};/* class ThreadLocal<T> */
template <class T>
class ThreadLocal<T*> : public ThreadLocalImpl<T*, sizeof(T*) <= sizeof(void*)> {
typedef ThreadLocalImpl<T*, sizeof(T*) <= sizeof(void*)> super;
public:
ThreadLocal() : super() {}
ThreadLocal(T* t) : super(t) {}
ThreadLocal(const ThreadLocal<T*>& tl) : super(tl) {}
ThreadLocal<T*>& operator=(T* t) {
return static_cast< ThreadLocal<T*>& >(super::operator=(t));
}
ThreadLocal<T*>& operator=(const ThreadLocal<T*>& tl) {
return static_cast< ThreadLocal<T*>& >(super::operator=(tl));
}
// special operators for pointers
T& operator*() {
return *static_cast<T*>(*this);
}
const T& operator*() const {
return *static_cast<const T*>(*this);
}
T* operator->() {
return static_cast<T*>(*this);
}
const T* operator->() const {
return static_cast<const T*>(*this);
}
T* operator++() {
T* p = *this;
*this = ++p;
return p;
}
T* operator++(int) {
T* p = *this;
*this = p + 1;
return p;
}
T* operator--() {
T* p = *this;
*this = --p;
return p;
}
T* operator--(int) {
T* p = *this;
*this = p - 1;
return p;
}
};/* class ThreadLocal<T*> */
}/* CVC4 namespace */
#endif /* @CVC4_TLS_SUPPORTED@ */
#endif /* _CVC4__TLS_H */
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