tbb_exception.h

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/*
    Copyright (c) 2005-2018 Intel Corporation

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.




*/

#ifndef __TBB_exception_H
#define __TBB_exception_H

#include "tbb_stddef.h"
#include <exception>
#include <new>    // required for bad_alloc definition, operators new
#include <string> // required to construct std exception classes

namespace tbb {

class bad_last_alloc : public std::bad_alloc {
public:
    const char* what() const throw() __TBB_override;
#if __TBB_DEFAULT_DTOR_THROW_SPEC_BROKEN
    ~bad_last_alloc() throw() __TBB_override {}
#endif
};

class improper_lock : public std::exception {
public:
    const char* what() const throw() __TBB_override;
};

class user_abort : public std::exception {
public:
    const char* what() const throw() __TBB_override;
};

class missing_wait : public std::exception {
public:
    const char* what() const throw() __TBB_override;
};

class invalid_multiple_scheduling : public std::exception {
public:
    const char* what() const throw() __TBB_override;
};

namespace internal {
void __TBB_EXPORTED_FUNC throw_bad_last_alloc_exception_v4();

enum exception_id {
    eid_bad_alloc = 1,
    eid_bad_last_alloc,
    eid_nonpositive_step,
    eid_out_of_range,
    eid_segment_range_error,
    eid_index_range_error,
    eid_missing_wait,
    eid_invalid_multiple_scheduling,
    eid_improper_lock,
    eid_possible_deadlock,
    eid_operation_not_permitted,
    eid_condvar_wait_failed,
    eid_invalid_load_factor,
    eid_reserved, // free slot for backward compatibility, can be reused.
    eid_invalid_swap,
    eid_reservation_length_error,
    eid_invalid_key,
    eid_user_abort,
    eid_reserved1,
#if __TBB_SUPPORTS_WORKERS_WAITING_IN_TERMINATE
    // This id is used only from inside the library and only for support of CPF functionality.
    // So, if we drop the functionality, eid_reserved1 can be safely renamed and reused.
    eid_blocking_thread_join_impossible = eid_reserved1,
#endif
    eid_bad_tagged_msg_cast,

    eid_max
};


void __TBB_EXPORTED_FUNC throw_exception_v4 ( exception_id );

inline void throw_exception ( exception_id eid ) { throw_exception_v4(eid); }

} // namespace internal
} // namespace tbb

#if __TBB_TASK_GROUP_CONTEXT
#include "tbb_allocator.h"
#include <typeinfo> //for typeid

namespace tbb {


class tbb_exception : public std::exception
{
    void* operator new ( size_t );

public:
#if __clang__
    // At -O3 or even -O2 optimization level, Clang may fully throw away an empty destructor
    // of tbb_exception from destructors of derived classes. As a result, it does not create
    // vtable for tbb_exception, which is a required part of TBB binary interface.
    // Making the destructor non-empty (with just a semicolon) prevents that optimization.
    ~tbb_exception() throw() { /* keep the semicolon! */ ; }
#endif


    virtual tbb_exception* move() throw() = 0;


    virtual void destroy() throw() = 0;


    virtual void throw_self() = 0;

    virtual const char* name() const throw() = 0;

    virtual const char* what() const throw() __TBB_override = 0;

    void operator delete ( void* p ) {
        internal::deallocate_via_handler_v3(p);
    }
};


class captured_exception : public tbb_exception
{
public:
    captured_exception( const captured_exception& src )
        : tbb_exception(src), my_dynamic(false)
    {
        set(src.my_exception_name, src.my_exception_info);
    }

    captured_exception( const char* name_, const char* info )
        : my_dynamic(false)
    {
        set(name_, info);
    }

    __TBB_EXPORTED_METHOD ~captured_exception() throw();

    captured_exception& operator= ( const captured_exception& src ) {
        if ( this != &src ) {
            clear();
            set(src.my_exception_name, src.my_exception_info);
        }
        return *this;
    }

    captured_exception* __TBB_EXPORTED_METHOD move() throw() __TBB_override;

    void __TBB_EXPORTED_METHOD destroy() throw() __TBB_override;

    void throw_self() __TBB_override { __TBB_THROW(*this); }

    const char* __TBB_EXPORTED_METHOD name() const throw() __TBB_override;

    const char* __TBB_EXPORTED_METHOD what() const throw() __TBB_override;

    void __TBB_EXPORTED_METHOD set( const char* name, const char* info ) throw();
    void __TBB_EXPORTED_METHOD clear() throw();

private:
    captured_exception() {}

    static captured_exception* allocate( const char* name, const char* info );

    bool my_dynamic;
    const char* my_exception_name;
    const char* my_exception_info;
};


template<typename ExceptionData>
class movable_exception : public tbb_exception
{
    typedef movable_exception<ExceptionData> self_type;

public:
    movable_exception( const ExceptionData& data_ )
        : my_exception_data(data_)
        , my_dynamic(false)
        , my_exception_name(
#if TBB_USE_EXCEPTIONS
        typeid(self_type).name()
#else /* !TBB_USE_EXCEPTIONS */
        "movable_exception"
#endif /* !TBB_USE_EXCEPTIONS */
        )
    {}

    movable_exception( const movable_exception& src ) throw ()
        : tbb_exception(src)
        , my_exception_data(src.my_exception_data)
        , my_dynamic(false)
        , my_exception_name(src.my_exception_name)
    {}

    ~movable_exception() throw() {}

    const movable_exception& operator= ( const movable_exception& src ) {
        if ( this != &src ) {
            my_exception_data = src.my_exception_data;
            my_exception_name = src.my_exception_name;
        }
        return *this;
    }

    ExceptionData& data() throw() { return my_exception_data; }

    const ExceptionData& data() const throw() { return my_exception_data; }

    const char* name() const throw() __TBB_override { return my_exception_name; }

    const char* what() const throw() __TBB_override { return "tbb::movable_exception"; }

    movable_exception* move() throw() __TBB_override {
        void* e = internal::allocate_via_handler_v3(sizeof(movable_exception));
        if ( e ) {
            ::new (e) movable_exception(*this);
            ((movable_exception*)e)->my_dynamic = true;
        }
        return (movable_exception*)e;
    }
    void destroy() throw() __TBB_override {
        __TBB_ASSERT ( my_dynamic, "Method destroy can be called only on dynamically allocated movable_exceptions" );
        if ( my_dynamic ) {
            this->~movable_exception();
            internal::deallocate_via_handler_v3(this);
        }
    }
    void throw_self() __TBB_override { __TBB_THROW( *this ); }

protected:
    ExceptionData  my_exception_data;

private:
    bool my_dynamic;


    const char* my_exception_name;
};

#if !TBB_USE_CAPTURED_EXCEPTION
namespace internal {


class tbb_exception_ptr {
    std::exception_ptr  my_ptr;

public:
    static tbb_exception_ptr* allocate();
    static tbb_exception_ptr* allocate( const tbb_exception& tag );
    static tbb_exception_ptr* allocate( captured_exception& src );


    void destroy() throw();

    void throw_self() { std::rethrow_exception(my_ptr); }

private:
    tbb_exception_ptr( const std::exception_ptr& src ) : my_ptr(src) {}
    tbb_exception_ptr( const captured_exception& src ) :
        #if __TBB_MAKE_EXCEPTION_PTR_PRESENT
            my_ptr(std::make_exception_ptr(src))  // the final function name in C++11
        #else
            my_ptr(std::copy_exception(src))      // early C++0x drafts name
        #endif
    {}
}; // class tbb::internal::tbb_exception_ptr

} // namespace internal
#endif /* !TBB_USE_CAPTURED_EXCEPTION */

} // namespace tbb

#endif /* __TBB_TASK_GROUP_CONTEXT */

#endif /* __TBB_exception_H */