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// trdlocal.cpp - written and placed in the public domain by Wei Dai
#include "pch.h"
#include "config.h"
// TODO: fix this when more complete C++11 support is cut-in
#if CRYPTOPP_MSC_VERSION
# pragma warning(disable: 4297)
#endif
#ifndef CRYPTOPP_IMPORTS
#ifdef THREADS_AVAILABLE
#include "trdlocal.h"
#ifdef HAS_WINTHREADS
#include <windows.h>
#endif
NAMESPACE_BEGIN(CryptoPP)
ThreadLocalStorage::Err::Err(const std::string& operation, int error)
: OS_Error(OTHER_ERROR, "ThreadLocalStorage: " + operation + " operation failed with error 0x" + IntToString(error, 16), operation, error)
{
}
ThreadLocalStorage::ThreadLocalStorage()
{
#ifdef HAS_WINTHREADS
m_index = TlsAlloc();
assert(m_index != TLS_OUT_OF_INDEXES);
if (m_index == TLS_OUT_OF_INDEXES)
throw Err("TlsAlloc", GetLastError());
#else
m_index = 0;
int error = pthread_key_create(&m_index, NULL);
assert(!error);
if (error)
throw Err("pthread_key_create", error);
#endif
}
ThreadLocalStorage::~ThreadLocalStorage() CRYPTOPP_THROW
{
#ifdef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
if (!std::uncaught_exception())
#else
try
#endif
#ifdef HAS_WINTHREADS
{
int rc = TlsFree(m_index);
assert(rc);
if (!rc)
throw Err("TlsFree", GetLastError());
}
#else
{
int error = pthread_key_delete(m_index);
assert(!error);
if (error)
throw Err("pthread_key_delete", error);
}
#endif
#ifndef CRYPTOPP_UNCAUGHT_EXCEPTION_AVAILABLE
catch(const Exception&)
{
}
#endif
}
void ThreadLocalStorage::SetValue(void *value)
{
#ifdef HAS_WINTHREADS
if (!TlsSetValue(m_index, value))
throw Err("TlsSetValue", GetLastError());
#else
int error = pthread_setspecific(m_index, value);
if (error)
throw Err("pthread_key_getspecific", error);
#endif
}
void *ThreadLocalStorage::GetValue() const
{
#ifdef HAS_WINTHREADS
void *result = TlsGetValue(m_index);
const DWORD dwRet = GetLastError();
assert(result || (!result && (dwRet == NO_ERROR)));
if (!result && dwRet != NO_ERROR)
throw Err("TlsGetValue", dwRet);
#else
// Null is a valid return value. Posix does not provide a way to
// check for a "good" Null vs a "bad" Null (errno is not set).
void *result = pthread_getspecific(m_index);
#endif
return result;
}
NAMESPACE_END
#endif // #ifdef THREADS_AVAILABLE
#endif
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