Annotation of src/lib/libc/atomic/atomic_inc.3, Revision 1.1
1.1 ! ad 1: .\" $NetBSD: atomic_inc.3,v 1.3 2008/04/30 13:10:46 martin Exp $
! 2: .\"
! 3: .\" Copyright (c) 2007 The NetBSD Foundation, Inc.
! 4: .\" All rights reserved.
! 5: .\"
! 6: .\" This code is derived from software contributed to The NetBSD Foundation
! 7: .\" by Jason R. Thorpe.
! 8: .\"
! 9: .\" Redistribution and use in source and binary forms, with or without
! 10: .\" modification, are permitted provided that the following conditions
! 11: .\" are met:
! 12: .\" 1. Redistributions of source code must retain the above copyright
! 13: .\" notice, this list of conditions and the following disclaimer.
! 14: .\" 2. Redistributions in binary form must reproduce the above copyright
! 15: .\" notice, this list of conditions and the following disclaimer in the
! 16: .\" documentation and/or other materials provided with the distribution.
! 17: .\"
! 18: .\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
! 19: .\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
! 20: .\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
! 21: .\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
! 22: .\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
! 23: .\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
! 24: .\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
! 25: .\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
! 26: .\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
! 27: .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
! 28: .\" POSSIBILITY OF SUCH DAMAGE.
! 29: .\"
! 30: .Dd April 11, 2007
! 31: .Dt ATOMIC_INC 3
! 32: .Os
! 33: .Sh NAME
! 34: .Nm atomic_inc ,
! 35: .Nm atomic_inc_32 ,
! 36: .Nm atomic_inc_uint ,
! 37: .Nm atomic_inc_ulong ,
! 38: .Nm atomic_inc_ptr ,
! 39: .Nm atomic_inc_64 ,
! 40: .Nm atomic_inc_32_nv ,
! 41: .Nm atomic_inc_uint_nv ,
! 42: .Nm atomic_inc_ulong_nv ,
! 43: .Nm atomic_inc_ptr_nv ,
! 44: .Nm atomic_inc_64_nv
! 45: .Nd atomic increment operations
! 46: .\" .Sh LIBRARY
! 47: .\" .Lb libc
! 48: .Sh SYNOPSIS
! 49: .In sys/atomic.h
! 50: .Ft void
! 51: .Fn atomic_inc_32 "volatile uint32_t *ptr"
! 52: .Ft void
! 53: .Fn atomic_inc_uint "volatile unsigned int *ptr"
! 54: .Ft void
! 55: .Fn atomic_inc_ulong "volatile unsigned long *ptr"
! 56: .Ft void
! 57: .Fn atomic_inc_ptr "volatile void *ptr"
! 58: .Ft void
! 59: .Fn atomic_inc_64 "volatile uint64_t *ptr"
! 60: .Ft uint32_t
! 61: .Fn atomic_inc_32_nv "volatile uint32_t *ptr"
! 62: .Ft unsigned int
! 63: .Fn atomic_inc_uint_nv "volatile unsigned int *ptr"
! 64: .Ft unsigned long
! 65: .Fn atomic_inc_ulong_nv "volatile unsigned long *ptr"
! 66: .Ft void *
! 67: .Fn atomic_inc_ptr_nv "volatile void *ptr"
! 68: .Ft uint64_t
! 69: .Fn atomic_inc_64_nv "volatile uint64_t *ptr"
! 70: .Sh DESCRIPTION
! 71: The
! 72: .Nm atomic_inc
! 73: family of functions increment
! 74: .Pq by one
! 75: the variable referenced by
! 76: .Fa ptr
! 77: in an atomic fashion.
! 78: .Pp
! 79: The
! 80: .Fn *_nv
! 81: variants of these functions return the new value.
! 82: .Pp
! 83: The 64-bit variants of these functions are available only on platforms
! 84: that can support atomic 64-bit memory access.
! 85: Applications can check for the availability of 64-bit atomic memory
! 86: operations by testing if the pre-processor macro
! 87: .Dv __HAVE_ATOMIC64_OPS
! 88: is defined.
! 89: .Sh SEE ALSO
! 90: .Xr atomic_ops 3
! 91: .Sh HISTORY
! 92: The
! 93: .Nm atomic_inc
! 94: functions first appeared in
! 95: .Nx 5.0 .
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