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Added a slightly more optimal implementation for the case when pthread_key_t is an integer, like on Linux.

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This commit is contained in:
Andrey Semashev
2016-01-10 17:27:37 +03:00
parent 83e7e33646
commit b909c5bdb3
1 changed files with 47 additions and 3 deletions
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50
src/thread_specific.cpp
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@@ -68,6 +68,8 @@ BOOST_LOG_CLOSE_NAMESPACE // namespace log
#include <cstddef>
#include <cstring>
#include <pthread.h>
#include <boost/cstdint.hpp>
#include <boost/type_traits/is_integral.hpp>
#include <boost/log/detail/header.hpp>
namespace boost {
@@ -79,7 +81,7 @@ namespace aux {
BOOST_LOG_ANONYMOUS_NAMESPACE {
//! Some portability magic to detect how to store the TLS key
template< typename KeyT, bool IsStoreableV = sizeof(KeyT) <= sizeof(void*) >
template< typename KeyT, bool IsStoreableV = sizeof(KeyT) <= sizeof(void*), bool IsIntegralV = boost::is_integral< KeyT >::value >
struct pthread_key_traits
{
typedef KeyT pthread_key_type;
@@ -119,7 +121,49 @@ struct pthread_key_traits
};
template< typename KeyT >
struct pthread_key_traits< KeyT, true >
struct pthread_key_traits< KeyT, true, true >
{
typedef KeyT pthread_key_type;
#if defined(BOOST_HAS_INTPTR_T)
typedef uintptr_t uint_type;
#else
typedef std::size_t uint_type;
#endif
static void allocate(void*& stg)
{
pthread_key_type key;
const int res = pthread_key_create(&key, NULL);
if (BOOST_UNLIKELY(res != 0))
{
BOOST_LOG_THROW_DESCR_PARAMS(system_error, "TLS capacity depleted", (res));
}
stg = (void*)(uint_type)key;
}
static void deallocate(void* stg)
{
pthread_key_delete((pthread_key_type)(uint_type)stg);
}
static void set_value(void* stg, void* value)
{
const int res = pthread_setspecific((pthread_key_type)(uint_type)stg, value);
if (BOOST_UNLIKELY(res != 0))
{
BOOST_LOG_THROW_DESCR_PARAMS(system_error, "Failed to set TLS value", (res));
}
}
static void* get_value(void* stg)
{
return pthread_getspecific((pthread_key_type)(uint_type)stg);
}
};
template< typename KeyT >
struct pthread_key_traits< KeyT, true, false >
{
typedef KeyT pthread_key_type;
@@ -162,7 +206,7 @@ struct pthread_key_traits< KeyT, true >
};
template< typename KeyT >
struct pthread_key_traits< KeyT*, true >
struct pthread_key_traits< KeyT*, true, false >
{
typedef KeyT* pthread_key_type;