thread_local.hpp (4300B)
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/* Relacy Race Detector
* Copyright (c) 2008-2010, Dmitry S. Vyukov
* All rights reserved.
* This software is provided AS-IS with no warranty, either express or implied.
* This software is distributed under a license and may not be copied,
* modified or distributed except as expressly authorized under the
* terms of the license contained in the file LICENSE.TXT in this distribution.
*/
#ifndef RL_THREAD_LOCAL_HPP
#define RL_THREAD_LOCAL_HPP
#ifdef _MSC_VER
# pragma once
#endif
#include "base.hpp"
#include "signature.hpp"
#include "context.hpp"
namespace rl
{
class generic_thread_local : nocopy<>
{
public:
generic_thread_local()
: index_(-1)
{
}
~generic_thread_local()
{
}
void init(void (*dtor)(intptr_t), debug_info_param info)
{
sign_.check(info);
//RL_ASSERT(index_ == -1);
index_ = ctx().thread_local_alloc(dtor);
}
void deinit(debug_info_param info)
{
sign_.check(info);
RL_ASSERT(index_ != -1);
ctx().thread_local_free(index_);
index_ = -1;
}
void set(intptr_t value, debug_info_param info)
{
sign_.check(info);
ctx().thread_local_set(index_, value);
}
intptr_t get(debug_info_param info)
{
sign_.check(info);
return ctx().thread_local_get(index_);
}
private:
signature<0xf1724ae2> sign_;
int index_;
};
template<typename T>
class thread_local_var;
template<typename T>
class thread_local_proxy
{
public:
thread_local_proxy(thread_local_var<T>& var, debug_info_param info)
: var_(var)
, info_(info)
{}
operator T () const
{
return var_.get(info_);
}
T operator -> () const
{
return var_.get(info_);
}
thread_local_proxy operator = (T value)
{
var_.set(value, info_);
return *this;
}
private:
thread_local_var<T>& var_;
debug_info info_;
thread_local_proxy& operator = (thread_local_proxy const&);
};
template<typename T>
class thread_local_var : generic_thread_local
{
public:
thread_local_var()
: ctx_seq_()
{
}
~thread_local_var()
{
}
thread_local_proxy<T> operator () (debug_info_param info)
{
return thread_local_proxy<T>(*this, info);
}
void set(T value, debug_info_param info)
{
if (ctx_seq_ != ctx().get_ctx_seq())
{
ctx_seq_ = ctx().get_ctx_seq();
generic_thread_local::init(0, info);
}
generic_thread_local::set((intptr_t)value, info);
}
T get(debug_info_param info)
{
if (ctx_seq_ != ctx().get_ctx_seq())
{
ctx_seq_ = ctx().get_ctx_seq();
generic_thread_local::init(0, info);
}
return (T)generic_thread_local::get(info);
}
private:
unsigned ctx_seq_;
};
inline unsigned long rl_TlsAlloc(debug_info_param info)
{
#ifndef RL_GC
//!!! may break on x64 platform
// TLS index is exactly DWORD (not DWORD_PTR), so one has to use indirection
return (unsigned long)new (info) thread_local_var<void*> ();
#else
void* p = ctx().alloc(sizeof(thread_local_var<void*>), false, info);
new (p) thread_local_var<void*> ();
return (unsigned long)p;
#endif
}
inline void rl_TlsFree(unsigned long slot, debug_info_param info)
{
#ifndef RL_GC
delete_impl((thread_local_var<void*>*)slot, info);
#else
thread_local_var<void*>* t = (thread_local_var<void*>*)slot;
t->~thread_local_var<void*>();
ctx().free(t, false, info);
#endif
}
inline void* rl_TlsGetValue(unsigned long slot, debug_info_param info)
{
return ((thread_local_var<void*>*)slot)->get(info);
}
inline int rl_TlsSetValue(unsigned long slot, void* value, debug_info_param info)
{
((thread_local_var<void*>*)slot)->set(value, info);
return 1;
}
#define TlsAlloc() rl::rl_TlsAlloc($)
#define TlsFree(slot) rl::rl_TlsFree((slot), $)
#define TlsGetValue(slot) rl::rl_TlsGetValue((slot), $)
#define TlsSetValue(slot, value) rl::rl_TlsSetValue((slot), (value), $)
}
#endif
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