Atomic Operations
[Intel IA32 (32-bit) Architecture]

Collaboration diagram for Atomic Operations:

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Detailed Description

This module contains inline functions providing some basic atomic (non-interruptible) operation which can be used to build higher-level serialization constructs.

All zygoma ports MUST provide these functions.

Typedefs
typedef int	Zygoma::ia32::AtomicWord
	A platform-specific atomically-addressable value.
Functions
AtomicWord	Zygoma::ia32::atomicExchange (volatile AtomicWord *mem, int value)
	Atomically exchanges the value found at "mem" with the value passed in as "value," returns the original value found at "mem".
AtomicWord	Zygoma::ia32::atomicExchangeAndAdd (volatile AtomicWord *mem, int value)
	Atomically sets the value at "mem" to "value," returns the sum of "value" and the value originally found at "mem".
void	Zygoma::ia32::atomicAdd (volatile AtomicWord *mem, int value)
	Atomically adds "value" to the value stored at "mem," stores result at "mem.

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Typedef Documentation

typedef int Zygoma::ia32::AtomicWord

A platform-specific atomically-addressable value. Not all operations on this value are guaranteed to be atomic, but those operations that are atomic work on values of this type.

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Function Documentation

void Zygoma::ia32::atomicAdd (  volatile AtomicWord *  mem, int  value )

Atomically adds "value" to the value stored at "mem," stores result at "mem. " Parameters: mem  A pointer to an atomic word in memory. value  A value to be added to the value of the atomic word pointed to by mem.

AtomicWord Zygoma::ia32::atomicExchange (  volatile AtomicWord *  mem, int  value )

Atomically exchanges the value found at "mem" with the value passed in as "value," returns the original value found at "mem". Parameters: mem  A pointer to an atomic word in memory. value  A value to be written to the atomic word pointed to by mem. Returns: The original value at mem.

AtomicWord Zygoma::ia32::atomicExchangeAndAdd (  volatile AtomicWord *  mem, int  value )

Atomically sets the value at "mem" to "value," returns the sum of "value" and the value originally found at "mem". Parameters: mem  A pointer to an atomic word in memory. value  A value to be written to the atomic word pointed to by mem. Returns: The original value at mem.

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