/*
    Copyright 2005-2013 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.
*/

#include "ittnotify_config.h"

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#define PATH_MAX 512
#else /* ITT_PLATFORM!=ITT_PLATFORM_WIN */
#include <limits.h>
#include <dlfcn.h>
#include <errno.h>
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>

#define INTEL_NO_MACRO_BODY
#define INTEL_ITTNOTIFY_API_PRIVATE
#include "ittnotify.h"
#include "legacy/ittnotify.h"

#include "disable_warnings.h"

static const char api_version[] = API_VERSION "\0\n@(#) 201495 2011-12-01 14:14:56Z\n";

#define _N_(n) ITT_JOIN(INTEL_ITTNOTIFY_PREFIX,n)

#if ITT_OS==ITT_OS_WIN
static const char* ittnotify_lib_name = "libittnotify.dll";
#elif ITT_OS==ITT_OS_LINUX
static const char* ittnotify_lib_name = "libittnotify.so";
#elif ITT_OS==ITT_OS_MAC
static const char* ittnotify_lib_name = "libittnotify.dylib";
#else
#error Unsupported or unknown OS.
#endif

#ifndef LIB_VAR_NAME
#if ITT_ARCH==ITT_ARCH_IA32
#define LIB_VAR_NAME INTEL_LIBITTNOTIFY32
#else
#define LIB_VAR_NAME INTEL_LIBITTNOTIFY64
#endif
#endif /* LIB_VAR_NAME */

#define ITT_MUTEX_INIT_AND_LOCK(p) {                                 \
        if (!p.mutex_initialized)                                    \
        {                                                            \
            if (__itt_interlocked_increment(&p.atomic_counter) == 1) \
            {                                                        \
                __itt_mutex_init(&p.mutex);                          \
                p.mutex_initialized = 1;                             \
            }                                                        \
            else                                                     \
                while (!p.mutex_initialized)                         \
                    __itt_thread_yield();                            \
        }                                                            \
        __itt_mutex_lock(&p.mutex);                                  \
}

const int _N_(err) = 0;

typedef int (__itt_init_ittlib_t)(const char*, __itt_group_id);

/* this define used to control initialization function name. */
#ifndef __itt_init_ittlib_name
ITT_EXTERN_C int _N_(init_ittlib)(const char*, __itt_group_id);
static __itt_init_ittlib_t* __itt_init_ittlib_ptr = _N_(init_ittlib);
#define __itt_init_ittlib_name __itt_init_ittlib_ptr
#endif /* __itt_init_ittlib_name */

typedef void (__itt_fini_ittlib_t)(void);

/* this define used to control finalization function name. */
#ifndef __itt_fini_ittlib_name
ITT_EXTERN_C void _N_(fini_ittlib)(void);
static __itt_fini_ittlib_t* __itt_fini_ittlib_ptr = _N_(fini_ittlib);
#define __itt_fini_ittlib_name __itt_fini_ittlib_ptr
#endif /* __itt_fini_ittlib_name */

/* building pointers to imported funcs */
#undef ITT_STUBV
#undef ITT_STUB
#define ITT_STUB(api,type,name,args,params,ptr,group,format)   \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args;\
typedef type api ITT_JOIN(_N_(name),_t) args;                  \
ITT_EXTERN_C { ITT_JOIN(_N_(name),_t)* ITTNOTIFY_NAME(name) = ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)); } \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args \
{                                                              \
    __itt_init_ittlib_name(NULL, __itt_group_all);             \
    if (ITTNOTIFY_NAME(name) && ITTNOTIFY_NAME(name) != ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init))) \
        return ITTNOTIFY_NAME(name) params;                    \
    else                                                       \
        return (type)0;                                        \
}

#define ITT_STUBV(api,type,name,args,params,ptr,group,format)  \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args;\
typedef type api ITT_JOIN(_N_(name),_t) args;                  \
ITT_EXTERN_C {                                                 \
ITT_JOIN(_N_(name),_t)* ITTNOTIFY_NAME(name) = ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)); } \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args \
{                                                              \
    __itt_init_ittlib_name(NULL, __itt_group_all);             \
    if (ITTNOTIFY_NAME(name) && ITTNOTIFY_NAME(name) != ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init))) \
        ITTNOTIFY_NAME(name) params;                           \
    else                                                       \
        return;                                                \
}

#undef __ITT_INTERNAL_INIT
#include "ittnotify_static.h"

#undef ITT_STUB
#undef ITT_STUBV
#define ITT_STUB(api,type,name,args,params,ptr,group,format)   \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args;\
typedef type api ITT_JOIN(_N_(name),_t) args;                  \
ITT_EXTERN_C {                                                 \
ITT_JOIN(_N_(name),_t)* ITTNOTIFY_NAME(name) = ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)); }

#define ITT_STUBV(api,type,name,args,params,ptr,group,format)  \
static type api ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)) args;\
typedef type api ITT_JOIN(_N_(name),_t) args;                  \
ITT_EXTERN_C { ITT_JOIN(_N_(name),_t)* ITTNOTIFY_NAME(name) = ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)); }

#define __ITT_INTERNAL_INIT
#include "ittnotify_static.h"
#undef __ITT_INTERNAL_INIT

ITT_GROUP_LIST(group_list);

#pragma pack(push, 8)

typedef struct ___itt_group_alias
{
    const char*    env_var;
    __itt_group_id groups;
} __itt_group_alias;

static __itt_group_alias group_alias[] = {
    { "KMP_FOR_TPROFILE", (__itt_group_id)(__itt_group_control | __itt_group_thread | __itt_group_sync  | __itt_group_mark) },
    { "KMP_FOR_TCHECK",   (__itt_group_id)(__itt_group_control | __itt_group_thread | __itt_group_sync  | __itt_group_fsync | __itt_group_mark) },
    { NULL,               (__itt_group_none) },
    { api_version,        (__itt_group_none) } /* !!! Just to avoid unused code elimination !!! */
};

#pragma pack(pop)

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(push)
#pragma warning(disable: 4054) /* warning C4054: 'type cast' : from function pointer 'XXX' to data pointer 'void *' */
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

static __itt_api_info api_list[] = {
/* Define functions with static implementation */
#undef ITT_STUB
#undef ITT_STUBV
#define ITT_STUB(api,type,name,args,params,nameindll,group,format) {ITT_TO_STR(ITT_JOIN(__itt_,nameindll)), (void**)(void*)&ITTNOTIFY_NAME(name), (void*)&ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)), (void*)&ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)), (__itt_group_id)(group)},
#define ITT_STUBV ITT_STUB
#define __ITT_INTERNAL_INIT
#include "ittnotify_static.h"
#undef __ITT_INTERNAL_INIT
/* Define functions without static implementation */
#undef ITT_STUB
#undef ITT_STUBV
#define ITT_STUB(api,type,name,args,params,nameindll,group,format) {ITT_TO_STR(ITT_JOIN(__itt_,nameindll)), (void**)(void*)&ITTNOTIFY_NAME(name), (void*)&ITT_VERSIONIZE(ITT_JOIN(_N_(name),_init)), NULL, (__itt_group_id)(group)},
#define ITT_STUBV ITT_STUB
#include "ittnotify_static.h"
    {NULL, NULL, NULL, NULL, __itt_group_none}
};

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(pop)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

/* private, init thread info item. used for internal purposes */
static __itt_thread_info init_thread_info = {
    (const char*)NULL,                        /* nameA */
#if defined(UNICODE) || defined(_UNICODE)
    (const wchar_t*)NULL,                     /* nameW */
#else
    (void*)NULL,                              /* nameW */
#endif
    0,                                        /* tid */
    __itt_thread_normal,                      /* state */
    0,                                        /* extra1 */
    (void*)NULL,                              /* extra2 */
    (__itt_thread_info*)NULL                  /* next */
};

/* private, NULL domain item. used for internal purposes */
static __itt_domain null_domain = {
    0,                                        /* flags:  disabled by default */
    (const char*)NULL,                        /* nameA */
#if defined(UNICODE) || defined(_UNICODE)
    (const wchar_t*)NULL,                     /* nameW */
#else
    (void*)NULL,                              /* nameW */
#endif
    0,                                        /* extra1 */
    (void*)NULL,                              /* extra2 */
    (__itt_domain*)NULL                       /* next */
};

/* private, NULL string handle item. used for internal purposes */
static __itt_string_handle null_string_handle = {
    (const char*)NULL,                        /* strA */
#if defined(UNICODE) || defined(_UNICODE)
    (const wchar_t*)NULL,                     /* strW */
#else
    (void*)NULL,                              /* strW */
#endif
    0,                                        /* extra1 */
    (void*)NULL,                              /* extra2 */
    (__itt_string_handle*)NULL                /* next */
};

static const char dll_path[PATH_MAX] = { 0 };

/* static part descriptor which handles. all notification api attributes. */
__itt_global __itt_ittapi_global = {
    ITT_MAGIC,                                     /* identification info */
    ITT_MAJOR, ITT_MINOR, API_VERSION_BUILD,       /* version info */
    0,                                             /* api_initialized */
    0,                                             /* mutex_initialized */
    0,                                             /* atomic_counter */
    MUTEX_INITIALIZER,                             /* mutex */
    NULL,                                          /* dynamic library handle */
    NULL,                                          /* error_handler */
    (const char**)&dll_path,                       /* dll_path_ptr */
    (__itt_api_info*)&api_list,                    /* api_list_ptr */
    NULL,                                          /* next __itt_global */
    (__itt_thread_info*)&init_thread_info,         /* thread_list */
    (__itt_domain*)&null_domain,                   /* domain_list */
    (__itt_string_handle*)&null_string_handle,     /* string_list */
    __itt_collection_normal                        /* collection state */
};

typedef void (__itt_api_init_t)(__itt_global*, __itt_group_id);
typedef void (__itt_api_fini_t)(__itt_global*);

/* ========================================================================= */

#ifdef ITT_NOTIFY_EXT_REPORT
ITT_EXTERN_C void _N_(error_handler)(__itt_error_code, va_list args);
#endif /* ITT_NOTIFY_EXT_REPORT */

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(push)
#pragma warning(disable: 4055) /* warning C4055: 'type cast' : from data pointer 'void *' to function pointer 'XXX' */
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

static void __itt_report_error(__itt_error_code code, ...)
{
    va_list args;
    va_start(args, code);
    if (__itt_ittapi_global.error_handler != NULL)
    {
        __itt_error_handler_t* handler = (__itt_error_handler_t*)__itt_ittapi_global.error_handler;
        handler(code, args);
    }
#ifdef ITT_NOTIFY_EXT_REPORT
    _N_(error_handler)(code, args);
#endif /* ITT_NOTIFY_EXT_REPORT */
    va_end(args);
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(pop)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

#if ITT_PLATFORM==ITT_PLATFORM_WIN
static __itt_domain* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(domain_createW),_init))(const wchar_t* name)
{
    __itt_domain *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(domain_createW) && ITTNOTIFY_NAME(domain_createW) != ITT_VERSIONIZE(ITT_JOIN(_N_(domain_createW),_init)))
            return ITTNOTIFY_NAME(domain_createW)(name);
    }

    if (name == NULL)
        return __itt_ittapi_global.domain_list;

    ITT_MUTEX_INIT_AND_LOCK(__itt_ittapi_global);
    for (h_tail = NULL, h = __itt_ittapi_global.domain_list; h != NULL; h_tail = h, h = h->next)
        if (h->nameW != NULL && !wcscmp(h->nameW, name))
            break;
    if (h == NULL) {
        NEW_DOMAIN_W(&__itt_ittapi_global,h,h_tail,name);
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
    return h;
}

static __itt_domain* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(domain_createA),_init))(const char* name)
#else  /* ITT_PLATFORM!=ITT_PLATFORM_WIN */
static __itt_domain* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(domain_create),_init))(const char* name)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
{
    __itt_domain *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
#if ITT_PLATFORM==ITT_PLATFORM_WIN
        if (ITTNOTIFY_NAME(domain_createA) && ITTNOTIFY_NAME(domain_createA) != ITT_VERSIONIZE(ITT_JOIN(_N_(domain_createA),_init)))
            return ITTNOTIFY_NAME(domain_createA)(name);
#else
        if (ITTNOTIFY_NAME(domain_create) && ITTNOTIFY_NAME(domain_create) != ITT_VERSIONIZE(ITT_JOIN(_N_(domain_create),_init)))
            return ITTNOTIFY_NAME(domain_create)(name);
#endif
    }

    if (name == NULL)
        return __itt_ittapi_global.domain_list;

    ITT_MUTEX_INIT_AND_LOCK(__itt_ittapi_global);
    for (h_tail = NULL, h = __itt_ittapi_global.domain_list; h != NULL; h_tail = h, h = h->next)
        if (h->nameA != NULL && !__itt_fstrcmp(h->nameA, name))
            break;
    if (h == NULL) {
        NEW_DOMAIN_A(&__itt_ittapi_global,h,h_tail,name);
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
    return h;
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
static __itt_string_handle* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_createW),_init))(const wchar_t* name)
{
    __itt_string_handle *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(string_handle_createW) && ITTNOTIFY_NAME(string_handle_createW) != ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_createW),_init)))
            return ITTNOTIFY_NAME(string_handle_createW)(name);
    }

    if (name == NULL)
        return __itt_ittapi_global.string_list;

    ITT_MUTEX_INIT_AND_LOCK(__itt_ittapi_global);
    for (h_tail = NULL, h = __itt_ittapi_global.string_list; h != NULL; h_tail = h, h = h->next)
        if (h->strW != NULL && !wcscmp(h->strW, name))
            break;
    if (h == NULL) {
        NEW_STRING_HANDLE_W(&__itt_ittapi_global,h,h_tail,name);
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
    return h;
}

static __itt_string_handle* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_createA),_init))(const char* name)
#else  /* ITT_PLATFORM!=ITT_PLATFORM_WIN */
static __itt_string_handle* ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_create),_init))(const char* name)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
{
    __itt_string_handle *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
#if ITT_PLATFORM==ITT_PLATFORM_WIN
        if (ITTNOTIFY_NAME(string_handle_createA) && ITTNOTIFY_NAME(string_handle_createA) != ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_createA),_init)))
            return ITTNOTIFY_NAME(string_handle_createA)(name);
#else
        if (ITTNOTIFY_NAME(string_handle_create) && ITTNOTIFY_NAME(string_handle_create) != ITT_VERSIONIZE(ITT_JOIN(_N_(string_handle_create),_init)))
            return ITTNOTIFY_NAME(string_handle_create)(name);
#endif
    }

    if (name == NULL)
        return __itt_ittapi_global.string_list;

    ITT_MUTEX_INIT_AND_LOCK(__itt_ittapi_global);
    for (h_tail = NULL, h = __itt_ittapi_global.string_list; h != NULL; h_tail = h, h = h->next)
        if (h->strA != NULL && !__itt_fstrcmp(h->strA, name))
            break;
    if (h == NULL) {
        NEW_STRING_HANDLE_A(&__itt_ittapi_global,h,h_tail,name);
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
    return h;
}

/* -------------------------------------------------------------------------- */

static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(pause),_init))(void)
{
    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(pause) && ITTNOTIFY_NAME(pause) != ITT_VERSIONIZE(ITT_JOIN(_N_(pause),_init)))
        {
            ITTNOTIFY_NAME(pause)();
            return;
        }
    }
    __itt_ittapi_global.state = __itt_collection_paused;
}

static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(resume),_init))(void)
{
    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(resume) && ITTNOTIFY_NAME(resume) != ITT_VERSIONIZE(ITT_JOIN(_N_(resume),_init)))
        {
            ITTNOTIFY_NAME(resume)();
            return;
        }
    }
    __itt_ittapi_global.state = __itt_collection_normal;
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameW),_init))(const wchar_t* name)
{
    TIDT tid = __itt_thread_id();
    __itt_thread_info *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(thread_set_nameW) && ITTNOTIFY_NAME(thread_set_nameW) != ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameW),_init)))
        {
            ITTNOTIFY_NAME(thread_set_nameW)(name);
            return;
        }
    }

    __itt_mutex_lock(&__itt_ittapi_global.mutex);
    for (h_tail = NULL, h = __itt_ittapi_global.thread_list; h != NULL; h_tail = h, h = h->next)
        if (h->tid == tid)
            break;
    if (h == NULL) {
        NEW_THREAD_INFO_W(&__itt_ittapi_global, h, h_tail, tid, __itt_thread_normal, name);
    }
    else
    {
        h->nameW = name ? _wcsdup(name) : NULL;
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
}

static int ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thr_name_setW),_init))(const wchar_t* name, int namelen)
{
    namelen = namelen;
    ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameW),_init))(name);
    return 0;
}

static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameA),_init))(const char* name)
#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_name),_init))(const char* name)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
{
    TIDT tid = __itt_thread_id();
    __itt_thread_info *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
#if ITT_PLATFORM==ITT_PLATFORM_WIN
        if (ITTNOTIFY_NAME(thread_set_nameA) && ITTNOTIFY_NAME(thread_set_nameA) != ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameA),_init)))
        {
            ITTNOTIFY_NAME(thread_set_nameA)(name);
            return;
        }
#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
        if (ITTNOTIFY_NAME(thread_set_name) && ITTNOTIFY_NAME(thread_set_name) != ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_name),_init)))
        {
            ITTNOTIFY_NAME(thread_set_name)(name);
            return;
        }
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
    }

    __itt_mutex_lock(&__itt_ittapi_global.mutex);
    for (h_tail = NULL, h = __itt_ittapi_global.thread_list; h != NULL; h_tail = h, h = h->next)
        if (h->tid == tid)
            break;
    if (h == NULL) {
        NEW_THREAD_INFO_A(&__itt_ittapi_global, h, h_tail, tid, __itt_thread_normal, name);
    }
    else
    {
        h->nameA = name ? __itt_fstrdup(name) : NULL;
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
static int ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thr_name_setA),_init))(const char* name, int namelen)
{
    namelen = namelen;
    ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_nameA),_init))(name);
    return 0;
}
#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
static int ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thr_name_set),_init))(const char* name, int namelen)
{
    namelen = namelen;
    ITT_VERSIONIZE(ITT_JOIN(_N_(thread_set_name),_init))(name);
    return 0;
}
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thread_ignore),_init))(void)
{
    TIDT tid = __itt_thread_id();
    __itt_thread_info *h_tail, *h;

    if (!__itt_ittapi_global.api_initialized && __itt_ittapi_global.thread_list->tid == 0)
    {
        __itt_init_ittlib_name(NULL, __itt_group_all);
        if (ITTNOTIFY_NAME(thread_ignore) && ITTNOTIFY_NAME(thread_ignore) != ITT_VERSIONIZE(ITT_JOIN(_N_(thread_ignore),_init)))
        {
            ITTNOTIFY_NAME(thread_ignore)();
            return;
        }
    }

    __itt_mutex_lock(&__itt_ittapi_global.mutex);
    for (h_tail = NULL, h = __itt_ittapi_global.thread_list; h != NULL; h_tail = h, h = h->next)
        if (h->tid == tid)
            break;
    if (h == NULL) {
        static const char* name = "unknown";
        NEW_THREAD_INFO_A(&__itt_ittapi_global, h, h_tail, tid, __itt_thread_ignored, name);
    }
    else
    {
        h->state = __itt_thread_ignored;
    }
    __itt_mutex_unlock(&__itt_ittapi_global.mutex);
}

static void ITTAPI ITT_VERSIONIZE(ITT_JOIN(_N_(thr_ignore),_init))(void)
{
    ITT_VERSIONIZE(ITT_JOIN(_N_(thread_ignore),_init))();
}

/* -------------------------------------------------------------------------- */

static const char* __itt_fsplit(const char* s, const char* sep, const char** out, int* len)
{
    int i;
    int j;

    if (!s || !sep || !out || !len)
        return NULL;

    for (i = 0; s[i]; i++)
    {
        int b = 0;
        for (j = 0; sep[j]; j++)
            if (s[i] == sep[j])
            {
                b = 1;
                break;
            }
        if (!b)
            break;
    }

    if (!s[i])
        return NULL;

    *len = 0;
    *out = &s[i];

    for (; s[i]; i++, (*len)++)
    {
        int b = 0;
        for (j = 0; sep[j]; j++)
            if (s[i] == sep[j])
            {
                b = 1;
                break;
            }
        if (b)
            break;
    }

    for (; s[i]; i++)
    {
        int b = 0;
        for (j = 0; sep[j]; j++)
            if (s[i] == sep[j])
            {
                b = 1;
                break;
            }
        if (!b)
            break;
    }

    return &s[i];
}

/* This function return value of env variable that placed into static buffer.
 * !!! The same static buffer is used for subsequent calls. !!!
 * This was done to aviod dynamic allocation for few calls.
 * Actually we need this function only four times.
 */
static const char* __itt_get_env_var(const char* name)
{
#define MAX_ENV_VALUE_SIZE 4086
    static char  env_buff[MAX_ENV_VALUE_SIZE];
    static char* env_value = (char*)env_buff;

    if (name != NULL)
    {
#if ITT_PLATFORM==ITT_PLATFORM_WIN
        size_t max_len = MAX_ENV_VALUE_SIZE - (size_t)(env_value - env_buff);
        DWORD rc = GetEnvironmentVariableA(name, env_value, (DWORD)max_len);
        if (rc >= max_len)
            __itt_report_error(__itt_error_env_too_long, name, (size_t)rc - 1, (size_t)(max_len - 1));
        else if (rc > 0)
        {
            const char* ret = (const char*)env_value;
            env_value += rc + 1;
            return ret;
        }
        else
        {
            /* If environment variable is empty, GetEnvirornmentVariables()
             * returns zero (number of characters (not including terminating null),
             * and GetLastError() returns ERROR_SUCCESS. */
            DWORD err = GetLastError();
            if (err == ERROR_SUCCESS)
                return env_value;

            if (err != ERROR_ENVVAR_NOT_FOUND)
                __itt_report_error(__itt_error_cant_read_env, name, (int)err);
        }
#else  /* ITT_PLATFORM!=ITT_PLATFORM_WIN */
        char* env = getenv(name);
        if (env != NULL)
        {
            size_t len = strlen(env);
            size_t max_len = MAX_ENV_VALUE_SIZE - (size_t)(env_value - env_buff);
            if (len < max_len)
            {
                const char* ret = (const char*)env_value;
                strncpy(env_value, env, len + 1);
                env_value += len + 1;
                return ret;
            } else
                __itt_report_error(__itt_error_env_too_long, name, (size_t)len, (size_t)(max_len - 1));
        }
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
    }
    return NULL;
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN

#include <Winreg.h>

typedef LONG (APIENTRY* RegCloseKeyProcType)(HKEY);
typedef LONG (APIENTRY* RegOpenKeyExAProcType)(HKEY, LPCTSTR, DWORD, REGSAM, PHKEY);
typedef LONG (APIENTRY* RegGetValueAProcType)(HKEY, LPCTSTR, LPCTSTR, DWORD, LPDWORD, PVOID, LPDWORD);

/* This function return value of registry key that placed into static buffer.
 * This was done to aviod dynamic memory allocation.
 */
static const char* __itt_get_lib_name_registry(void)
{
#define MAX_REG_VALUE_SIZE 4086
    static char reg_buff[MAX_REG_VALUE_SIZE];
    DWORD size;
    LONG  res;
    HKEY  hKey;
    RegCloseKeyProcType   pRegCloseKey;
    RegOpenKeyExAProcType pRegOpenKeyExA;
    RegGetValueAProcType  pRegGetValueA;
    HMODULE h_advapi32 = LoadLibraryA("advapi32.dll");
    DWORD autodetect = 0;

    if (h_advapi32 == NULL)
    {
        return NULL;
    }

    pRegCloseKey   =   (RegCloseKeyProcType)GetProcAddress(h_advapi32, "CloseKey");
    pRegOpenKeyExA = (RegOpenKeyExAProcType)GetProcAddress(h_advapi32, "RegOpenKeyExA");
    pRegGetValueA  =  (RegGetValueAProcType)GetProcAddress(h_advapi32, "RegGetValueA");

    if (pRegCloseKey   == NULL ||
        pRegOpenKeyExA == NULL ||
        pRegGetValueA  == NULL)
    {
        FreeLibrary(h_advapi32);
        return NULL;
    }

    res = pRegOpenKeyExA(HKEY_CURRENT_USER, (LPCTSTR)"Software\\Intel Corporation\\ITT Environment\\Collector", 0, KEY_READ, &hKey);
    if (res != ERROR_SUCCESS || hKey == 0)
    {
        FreeLibrary(h_advapi32);
        return NULL;
    }

    size = sizeof(DWORD);
    res = pRegGetValueA(hKey, (LPCTSTR)"AutoDetect", NULL, RRF_RT_REG_DWORD, NULL, (BYTE*)&autodetect, &size);
    if (res != ERROR_SUCCESS || size == 0 || autodetect == 0)
    {
        pRegCloseKey(hKey);
        FreeLibrary(h_advapi32);
        return NULL;
    }

    size = MAX_REG_VALUE_SIZE-1;
    res = pRegGetValueA(hKey, (LPCTSTR)ITT_TO_STR(LIB_VAR_NAME), NULL, REG_SZ, NULL, (BYTE*)&reg_buff, &size);
    pRegCloseKey(hKey);
    FreeLibrary(h_advapi32);

    return (res == ERROR_SUCCESS && size > 0) ? reg_buff : NULL;
}

#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

static const char* __itt_get_lib_name(void)
{
    const char* lib_name = __itt_get_env_var(ITT_TO_STR(LIB_VAR_NAME));
#if ITT_PLATFORM==ITT_PLATFORM_WIN
    if (lib_name == NULL)
        lib_name = __itt_get_lib_name_registry();
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
    return lib_name;
}

#ifndef min
#define min(a,b) (a) < (b) ? (a) : (b)
#endif /* min */

static __itt_group_id __itt_get_groups(void)
{
    register int i;
    __itt_group_id res = __itt_group_none;
    const char* var_name  = "INTEL_ITTNOTIFY_GROUPS";
    const char* group_str = __itt_get_env_var(var_name);

    if (group_str != NULL)
    {
        int len;
        char gr[255];
        const char* chunk;
        while ((group_str = __itt_fsplit(group_str, ",; ", &chunk, &len)) != NULL)
        {
            __itt_fstrcpyn(gr, chunk, sizeof(gr));

            gr[min((unsigned)len, sizeof(gr) - 1)] = 0;

            for (i = 0; group_list[i].name != NULL; i++)
            {
                if (!__itt_fstrcmp(gr, group_list[i].name))
                {
                    res = (__itt_group_id)(res | group_list[i].id);
                    break;
                }
            }
        }
        /* TODO: !!! Workaround for bug with warning for unknown group !!!
         * Should be fixed in new initialization scheme.
         * Now the following groups should be set always. */
        for (i = 0; group_list[i].id != __itt_group_none; i++)
            if (group_list[i].id != __itt_group_all &&
                group_list[i].id > __itt_group_splitter_min &&
                group_list[i].id < __itt_group_splitter_max)
                res = (__itt_group_id)(res | group_list[i].id);
        return res;
    }
    else
    {
        for (i = 0; group_alias[i].env_var != NULL; i++)
            if (__itt_get_env_var(group_alias[i].env_var) != NULL)
                return group_alias[i].groups;
    }

    return res;
}

static int __itt_lib_version(lib_t lib)
{
    if (lib == NULL)
        return 0;
    if (__itt_get_proc(lib, "__itt_api_init"))
        return 2;
    if (__itt_get_proc(lib, "__itt_api_version"))
        return 1;
    return 0;
}

/* It's not used right now! Comment it out to avoid warnings.
static void __itt_reinit_all_pointers(void)
{
    register int i;
    // Fill all pointers with initial stubs
    for (i = 0; __itt_ittapi_global.api_list_ptr[i].name != NULL; i++)
        *__itt_ittapi_global.api_list_ptr[i].func_ptr = __itt_ittapi_global.api_list_ptr[i].init_func;
}
*/

static void __itt_nullify_all_pointers(void)
{
    register int i;
    /* Nulify all pointers except domain_create and string_handle_create */
    for (i = 0; __itt_ittapi_global.api_list_ptr[i].name != NULL; i++)
        *__itt_ittapi_global.api_list_ptr[i].func_ptr = __itt_ittapi_global.api_list_ptr[i].null_func;
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(push)
#pragma warning(disable: 4054) /* warning C4054: 'type cast' : from function pointer 'XXX' to data pointer 'void *' */
#pragma warning(disable: 4055) /* warning C4055: 'type cast' : from data pointer 'void *' to function pointer 'XXX' */
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */

ITT_EXTERN_C void _N_(fini_ittlib)(void)
{
    __itt_api_fini_t* __itt_api_fini_ptr;
    static volatile TIDT current_thread = 0;

    if (__itt_ittapi_global.api_initialized)
    {
        __itt_mutex_lock(&__itt_ittapi_global.mutex);
        if (__itt_ittapi_global.api_initialized)
        {
            if (current_thread == 0)
            {
                current_thread = __itt_thread_id();
                __itt_api_fini_ptr = (__itt_api_fini_t*)__itt_get_proc(__itt_ittapi_global.lib, "__itt_api_fini");
                if (__itt_api_fini_ptr)
                    __itt_api_fini_ptr(&__itt_ittapi_global);

                __itt_nullify_all_pointers();

 /* TODO: !!! not safe !!! don't support unload so far.
  *             if (__itt_ittapi_global.lib != NULL)
  *                 __itt_unload_lib(__itt_ittapi_global.lib);
  *             __itt_ittapi_global.lib = NULL;
  */
                __itt_ittapi_global.api_initialized = 0;
                current_thread = 0;
            }
        }
        __itt_mutex_unlock(&__itt_ittapi_global.mutex);
    }
}

ITT_EXTERN_C int _N_(init_ittlib)(const char* lib_name, __itt_group_id init_groups)
{
    register int i;
    __itt_group_id groups;
#ifdef ITT_COMPLETE_GROUP
    __itt_group_id zero_group = __itt_group_none;
#endif /* ITT_COMPLETE_GROUP */
    static volatile TIDT current_thread = 0;

    if (!__itt_ittapi_global.api_initialized)
    {
#ifndef ITT_SIMPLE_INIT
        ITT_MUTEX_INIT_AND_LOCK(__itt_ittapi_global);
#endif /* ITT_SIMPLE_INIT */

        if (!__itt_ittapi_global.api_initialized)
        {
            if (current_thread == 0)
            {
                current_thread = __itt_thread_id();
                __itt_ittapi_global.thread_list->tid = current_thread;
                if (lib_name == NULL)
                    lib_name = __itt_get_lib_name();
                groups = __itt_get_groups();
                if (groups != __itt_group_none || lib_name != NULL)
                {
                    __itt_ittapi_global.lib = __itt_load_lib((lib_name == NULL) ? ittnotify_lib_name : lib_name);
                    if (__itt_ittapi_global.lib != NULL)
                    {
                        __itt_api_init_t* __itt_api_init_ptr;
                        int lib_version = __itt_lib_version(__itt_ittapi_global.lib);

                        switch (lib_version) {
                        case 0:
                            groups = __itt_group_legacy;
                        case 1:
                            /* Fill all pointers from dynamic library */
                            for (i = 0; __itt_ittapi_global.api_list_ptr[i].name != NULL; i++)
                            {
                                if (__itt_ittapi_global.api_list_ptr[i].group & groups & init_groups)
                                {
                                    *__itt_ittapi_global.api_list_ptr[i].func_ptr = (void*)__itt_get_proc(__itt_ittapi_global.lib, __itt_ittapi_global.api_list_ptr[i].name);
                                    if (*__itt_ittapi_global.api_list_ptr[i].func_ptr == NULL)
                                    {
                                        /* Restore pointers for function with static implementation */
                                        *__itt_ittapi_global.api_list_ptr[i].func_ptr = __itt_ittapi_global.api_list_ptr[i].null_func;
                                        __itt_report_error(__itt_error_no_symbol, lib_name, __itt_ittapi_global.api_list_ptr[i].name);
#ifdef ITT_COMPLETE_GROUP
                                        zero_group = (__itt_group_id)(zero_group | __itt_ittapi_global.api_list_ptr[i].group);
#endif /* ITT_COMPLETE_GROUP */
                                    }
                                }
                                else
                                    *__itt_ittapi_global.api_list_ptr[i].func_ptr = __itt_ittapi_global.api_list_ptr[i].null_func;
                            }

                            if (groups == __itt_group_legacy)
                            {
                                /* Compatibility with legacy tools */
                                ITTNOTIFY_NAME(thread_ignore)  = ITTNOTIFY_NAME(thr_ignore);
#if ITT_PLATFORM==ITT_PLATFORM_WIN
                                ITTNOTIFY_NAME(sync_createA)   = ITTNOTIFY_NAME(sync_set_nameA);
                                ITTNOTIFY_NAME(sync_createW)   = ITTNOTIFY_NAME(sync_set_nameW);
#else  /* ITT_PLATFORM!=ITT_PLATFORM_WIN */
                                ITTNOTIFY_NAME(sync_create)    = ITTNOTIFY_NAME(sync_set_name);
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
                                ITTNOTIFY_NAME(sync_prepare)   = ITTNOTIFY_NAME(notify_sync_prepare);
                                ITTNOTIFY_NAME(sync_cancel)    = ITTNOTIFY_NAME(notify_sync_cancel);
                                ITTNOTIFY_NAME(sync_acquired)  = ITTNOTIFY_NAME(notify_sync_acquired);
                                ITTNOTIFY_NAME(sync_releasing) = ITTNOTIFY_NAME(notify_sync_releasing);
                            }

#ifdef ITT_COMPLETE_GROUP
                            for (i = 0; __itt_ittapi_global.api_list_ptr[i].name != NULL; i++)
                                if (__itt_ittapi_global.api_list_ptr[i].group & zero_group)
                                    *__itt_ittapi_global.api_list_ptr[i].func_ptr = __itt_ittapi_global.api_list_ptr[i].null_func;
#endif /* ITT_COMPLETE_GROUP */
                            break;
                        case 2:
                            __itt_api_init_ptr = (__itt_api_init_t*)__itt_get_proc(__itt_ittapi_global.lib, "__itt_api_init");
                            if (__itt_api_init_ptr)
                                __itt_api_init_ptr(&__itt_ittapi_global, init_groups);
                            break;
                        }
                    }
                    else
                    {
                        __itt_nullify_all_pointers();

                        __itt_report_error(__itt_error_no_module, lib_name,
#if ITT_PLATFORM==ITT_PLATFORM_WIN
                            __itt_system_error()
#else  /* ITT_PLATFORM==ITT_PLATFORM_WIN */
                            dlerror()
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
                        );
                    }
                }
                else
                {
                    __itt_nullify_all_pointers();
                }
                __itt_ittapi_global.api_initialized = 1;
                current_thread = 0;
                /* !!! Just to avoid unused code elimination !!! */
                if (__itt_fini_ittlib_ptr == _N_(fini_ittlib)) current_thread = 0;
            }
        }

#ifndef ITT_SIMPLE_INIT
        __itt_mutex_unlock(&__itt_ittapi_global.mutex);
#endif /* ITT_SIMPLE_INIT */
    }

    /* Evaluating if any function ptr is non empty and it's in init_groups */
    for (i = 0; __itt_ittapi_global.api_list_ptr[i].name != NULL; i++)
        if (*__itt_ittapi_global.api_list_ptr[i].func_ptr != __itt_ittapi_global.api_list_ptr[i].null_func &&
            __itt_ittapi_global.api_list_ptr[i].group & init_groups)
            return 1;
    return 0;
}

ITT_EXTERN_C __itt_error_handler_t* _N_(set_error_handler)(__itt_error_handler_t* handler)
{
    __itt_error_handler_t* prev = (__itt_error_handler_t*)__itt_ittapi_global.error_handler;
    __itt_ittapi_global.error_handler = (void*)handler;
    return prev;
}

#if ITT_PLATFORM==ITT_PLATFORM_WIN
#pragma warning(pop)
#endif /* ITT_PLATFORM==ITT_PLATFORM_WIN */
