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90abd04b34
git-svn-id: file:///srv/svn/repos/haiku/trunk/current@975 a95241bf-73f2-0310-859d-f6bbb57e9c96
99 lines
2.3 KiB
C
Executable File
99 lines
2.3 KiB
C
Executable File
#ifndef _KERNEL_ATOMIC_H
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#define _KERNEL_ATOMIC_H
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#include <ktypes.h>
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typedef volatile int vint32; //XXX misplaced here
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/**
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* @file kernel/atomic.h
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* @brief Prototypes for kernel and user versions of atomic
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* functions.
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*/
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/**
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* @defgroup Kernel_Atomic Atomic Operations
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* @ingroup OpenBeOS_Kernel
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* @{
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*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* atomic_add(), atomic_and(), atomic_or() must
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* match the definitions in SupportDefs.h
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*/
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/**
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* Perform an atomic addition.
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 atomic_add(vint32 *val, int32 incr);
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/**
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* Atomic and operation
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 atomic_and(vint32 *val, int32 incr);
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/**
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* Atomic or operation
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 atomic_or(vint32 *val, int32 incr);
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int32 atomic_set(vint32 *val, int32 set_to);
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/* Compare the value of val with test_val. If they
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* are equal then set the value of 'val' to
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* 'set_to'
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*/
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int32 test_and_set(vint32 *val, int32 set_to, int32 test_val);
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/**
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* Atomic add (user version)
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 user_atomic_add(vint32 *val, int32 incr);
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/**
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* Atomic and (user version)
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 user_atomic_and(vint32 *val, int32 incr);
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/**
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* Atomic or (user version)
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* @param val Pointer to an integer
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* @param incr The increment to add (may be -ve)
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* @note Returns value of val before addition
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*/
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int32 user_atomic_or(vint32 *val, int32 incr);
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int32 user_atomic_set(vint32 *val, int32 set_to);
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/* Compare the value of val with test_val. If they
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* are equal then set the value of 'val' to
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* 'set_to'
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* @note This is the user version and should not be used within
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* the kernel.
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*/
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int32 user_test_and_set(vint32 *val, int32 set_to, int32 test_val);
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#ifdef __cplusplus
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}
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#endif
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/** @} */
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#endif /* _KERNEL_ATOMIC_H */
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