/*
    Copyright 2005-2011 Intel Corporation.  All Rights Reserved.

    This file is part of Threading Building Blocks.

    Threading Building Blocks is free software; you can redistribute it
    and/or modify it under the terms of the GNU General Public License
    version 2 as published by the Free Software Foundation.

    Threading Building Blocks is distributed in the hope that it will be
    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with Threading Building Blocks; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    As a special exception, you may use this file as part of a free software
    library without restriction.  Specifically, if other files instantiate
    templates or use macros or inline functions from this file, or you compile
    this file and link it with other files to produce an executable, this
    file does not by itself cause the resulting executable to be covered by
    the GNU General Public License.  This exception does not however
    invalidate any other reasons why the executable file might be covered by
    the GNU General Public License.
*/

#ifndef __TBB_profiling_H
#define __TBB_profiling_H

// Check if the tools support is enabled
#if (_WIN32||_WIN64||__linux__) && !__MINGW32__ && TBB_USE_THREADING_TOOLS

#if _WIN32||_WIN64
#include <stdlib.h>  /* mbstowcs_s */
#endif
#include "tbb_stddef.h"

namespace tbb {
    namespace internal {
#if _WIN32||_WIN64
        void __TBB_EXPORTED_FUNC itt_set_sync_name_v3( void *obj, const wchar_t* name ); 
        inline size_t multibyte_to_widechar( wchar_t* wcs, const char* mbs, size_t bufsize) {
#if _MSC_VER>=1400
            size_t len;
            mbstowcs_s( &len, wcs, bufsize, mbs, _TRUNCATE );
            return len;   // mbstowcs_s counts null terminator
#else
            size_t len = mbstowcs( wcs, mbs, bufsize );
            if(wcs && len!=size_t(-1) )
                wcs[len<bufsize-1? len: bufsize-1] = wchar_t('\0');
            return len+1; // mbstowcs does not count null terminator
#endif
        }
#else
        void __TBB_EXPORTED_FUNC itt_set_sync_name_v3( void *obj, const char* name ); 
#endif
    } // namespace internal
} // namespace tbb

//! Macro __TBB_DEFINE_PROFILING_SET_NAME(T) defines "set_name" methods for sync objects of type T
/** Should be used in the "tbb" namespace only. 
    Don't place semicolon after it to avoid compiler warnings. **/
#if _WIN32||_WIN64
    #define __TBB_DEFINE_PROFILING_SET_NAME(sync_object_type)    \
        namespace profiling {                                                       \
            inline void set_name( sync_object_type& obj, const wchar_t* name ) {    \
                tbb::internal::itt_set_sync_name_v3( &obj, name );                  \
            }                                                                       \
            inline void set_name( sync_object_type& obj, const char* name ) {       \
                size_t len = tbb::internal::multibyte_to_widechar(NULL, name, 0);   \
                wchar_t *wname = new wchar_t[len];                                  \
                tbb::internal::multibyte_to_widechar(wname, name, len);             \
                set_name( obj, wname );                                             \
                delete[] wname;                                                     \
            }                                                                       \
        }
#else /* !WIN */
    #define __TBB_DEFINE_PROFILING_SET_NAME(sync_object_type)    \
        namespace profiling {                                                       \
            inline void set_name( sync_object_type& obj, const char* name ) {       \
                tbb::internal::itt_set_sync_name_v3( &obj, name );                  \
            }                                                                       \
        }
#endif /* !WIN */

#else /* no tools support */

#if _WIN32||_WIN64
    #define __TBB_DEFINE_PROFILING_SET_NAME(sync_object_type)    \
        namespace profiling {                                               \
            inline void set_name( sync_object_type&, const wchar_t* ) {}    \
            inline void set_name( sync_object_type&, const char* ) {}       \
        }
#else /* !WIN */
    #define __TBB_DEFINE_PROFILING_SET_NAME(sync_object_type)    \
        namespace profiling {                                               \
            inline void set_name( sync_object_type&, const char* ) {}       \
        }
#endif /* !WIN */

#endif /* no tools support */

#include "atomic.h"
// Need these to work regardless of tools support
namespace tbb {
    namespace internal {

        enum notify_type {prepare=0, cancel, acquired, releasing};
        const uintptr_t NUM_NOTIFY_TYPES = 4; // set to # elements in enum above
        
        void __TBB_EXPORTED_FUNC call_itt_notify_v5(int t, void *ptr);
        void __TBB_EXPORTED_FUNC itt_store_pointer_with_release_v3(void *dst, void *src);
        void* __TBB_EXPORTED_FUNC itt_load_pointer_with_acquire_v3(const void *src);
        void* __TBB_EXPORTED_FUNC itt_load_pointer_v3( const void* src );

        // two template arguments are to workaround /Wp64 warning with tbb::atomic specialized for unsigned type
        template <typename T, typename U>
        inline void itt_store_word_with_release(tbb::atomic<T>& dst, U src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized.");
            itt_store_pointer_with_release_v3(&dst, (void *)uintptr_t(src));
#else
            dst = src;
#endif // TBB_USE_THREADING_TOOLS
        }

        template <typename T>
        inline T itt_load_word_with_acquire(const tbb::atomic<T>& src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized.");
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
            // Workaround for overzealous compiler warnings 
            #pragma warning (push)
            #pragma warning (disable: 4311)
#endif
            T result = (T)itt_load_pointer_with_acquire_v3(&src);
#if defined(_MSC_VER) && !defined(__INTEL_COMPILER)
            #pragma warning (pop)
#endif
            return result;
#else
            return src;
#endif // TBB_USE_THREADING_TOOLS
        }

        template <typename T>
        inline void itt_store_word_with_release(T& dst, T src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized.");
            itt_store_pointer_with_release_v3(&dst, (void *)src);
#else
            __TBB_store_with_release(dst, src); 
#endif // TBB_USE_THREADING_TOOLS
        }

        template <typename T>
        inline T itt_load_word_with_acquire(const T& src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized");
            return (T)itt_load_pointer_with_acquire_v3(&src);
#else
            return __TBB_load_with_acquire(src);
#endif // TBB_USE_THREADING_TOOLS
        }
        
        template <typename T>
        inline void itt_hide_store_word(T& dst, T src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized");
            itt_store_pointer_with_release_v3(&dst, (void *)src);
#else
            dst = src;
#endif
        }

        template <typename T>
        inline T itt_hide_load_word(const T& src) {
#if TBB_USE_THREADING_TOOLS
            // This assertion should be replaced with static_assert
            __TBB_ASSERT(sizeof(T) == sizeof(void *), "Type must be word-sized.");
            return (T)itt_load_pointer_v3(&src);
#else
            return src;
#endif
        }

#if TBB_USE_THREADING_TOOLS
        inline void call_itt_notify(notify_type t, void *ptr) {
            call_itt_notify_v5((int)t, ptr);
        }
#else
        inline void call_itt_notify(notify_type /*t*/, void * /*ptr*/) {}
#endif // TBB_USE_THREADING_TOOLS

    } // namespace internal
} // namespace tbb

#endif /* __TBB_profiling_H */
