MBMesquite::MsqFPE Class Reference

Utility class used by InstructionQueue SIGFPE option. More...

#include <MsqFPE.hpp>

Public Member Functions
	MsqFPE (bool enabled)
	Set FPE state.
	~MsqFPE ()
	Restore FPE state.
Static Public Member Functions
static bool	fpe_trap_supported ()
	Check if FPE state manipulation is supported on this platform.
static int	get_current_fpe_state ()
static void	set_current_fpe_state (int state)
static void	enable_trap_fpe ()
Private Member Functions
void *	operator new (size_t)
	dummy declaration preventing heap allocation
	MsqFPE (const MsqFPE &)
	dummy declaration preventing default copy constructor
MsqFPE &	operator= (const MsqFPE &)
	dummy declaration preventing default assignment operator
Private Attributes
bool	isEnabled
int	prevState

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Detailed Description

Utility class used by InstructionQueue SIGFPE option.

This is a simple utility class for enabling floating point exceptions. It provides two functionalities. The first, implemented in the static methods, is a platform-independent mechanism for modifying the the FPE state. The second, implemented in the constructor/destructor, is a utlity for setting and resetting the FPE state. The FPE state is set when the object is created and reset when the object is destroted. The intention is that an instance of this object be declared on the stack such that when the instantiating function returns, the destructor is automatically invoked, restoring the original state.

Definition at line 50 of file MsqFPE.hpp.

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Constructor & Destructor Documentation

MBMesquite::MsqFPE::MsqFPE

(

bool

enabled

)

Set FPE state.

If enabled == true, floating point exceptions are enabled by the constructor and reset by the destructor. If enabled == false, nothing is done.

Definition at line 138 of file MsqFPE.cpp.

References enable_trap_fpe(), get_current_fpe_state(), isEnabled, and prevState.

                                       : isEnabled( enabled )
{
    if( isEnabled )
    {
        prevState = get_current_fpe_state();
        enable_trap_fpe();
    }
}

MBMesquite::MsqFPE::~MsqFPE

(

)

Restore FPE state.

Definition at line 147 of file MsqFPE.cpp.

{
    if( isEnabled )
    {
        set_current_fpe_state( prevState );
    }
}

MBMesquite::MsqFPE::MsqFPE

(

const MsqFPE &

)

[private]

dummy declaration preventing default copy constructor

---

Member Function Documentation

void MBMesquite::MsqFPE::enable_trap_fpe

(

)

[static]

Returns:

Enable trapping of INVALID, DIVBYZERO, and OVERFLOW

Definition at line 134 of file MsqFPE.cpp.

Referenced by MsqFPE().

{}

bool MBMesquite::MsqFPE::fpe_trap_supported

(

)

[static]

Check if FPE state manipulation is supported on this platform.

Definition at line 122 of file MsqFPE.cpp.

{
    return false;
}

int MBMesquite::MsqFPE::get_current_fpe_state

(

)

[static]

Returns:

An integer representing the current FPE flags

Definition at line 127 of file MsqFPE.cpp.

Referenced by MsqFPE().

{
    return 0;
}

void* MBMesquite::MsqFPE::operator new

(

size_t

)

[private]

dummy declaration preventing heap allocation

MsqFPE& MBMesquite::MsqFPE::operator=

(

const MsqFPE &

)

[private]

dummy declaration preventing default assignment operator

void MBMesquite::MsqFPE::set_current_fpe_state

(

int

state

)

[static]

Returns:

Set the FPE flags on the processor

Definition at line 132 of file MsqFPE.cpp.

{}

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Member Data Documentation

bool MBMesquite::MsqFPE::isEnabled [private]

Saved constructor argument for use in destructor

Definition at line 82 of file MsqFPE.hpp.

Referenced by MsqFPE().

int MBMesquite::MsqFPE::prevState [private]

Saved FPE state for use in destructor

Definition at line 84 of file MsqFPE.hpp.

Referenced by MsqFPE().

List of all members.

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The documentation for this class was generated from the following files:

• MsqFPE.hpp
• MsqFPE.cpp