| valloc.3 (108040) | valloc.3 (154252) |
|---|---|
| 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)valloc.3 8.1 (Berkeley) 6/4/93 | 1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 16 unchanged lines hidden (view full) --- 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)valloc.3 8.1 (Berkeley) 6/4/93 |
| 33.\" $FreeBSD: head/lib/libc/gen/valloc.3 108040 2002-12-18 13:33:04Z ru $ | 33.\" $FreeBSD: head/lib/libc/gen/valloc.3 154252 2006-01-12 09:29:38Z jasone $ |
| 34.\" | 34.\" |
| 35.Dd June 4, 1993 | 35.Dd September 13, 2005 |
| 36.Dt VALLOC 3 37.Os 38.Sh NAME 39.Nm valloc 40.Nd aligned memory allocation function 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In unistd.h 45.Ft void * 46.Fn valloc "size_t size" 47.Sh DESCRIPTION 48.Bf -symbolic 49The 50.Fn valloc | 36.Dt VALLOC 3 37.Os 38.Sh NAME 39.Nm valloc 40.Nd aligned memory allocation function 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In unistd.h 45.Ft void * 46.Fn valloc "size_t size" 47.Sh DESCRIPTION 48.Bf -symbolic 49The 50.Fn valloc |
| 51function is obsoleted by the current version of 52.Xr malloc 3 , 53which aligns page-sized and larger allocations. | 51function is obsoleted by 52.Xr posix_memalign 3 , 53which can be used to request page-aligned allocations. |
| 54.Ef 55.Pp 56The 57.Fn valloc 58function 59allocates 60.Fa size 61bytes aligned on a page boundary. | 54.Ef 55.Pp 56The 57.Fn valloc 58function 59allocates 60.Fa size 61bytes aligned on a page boundary. |
| 62It is implemented by calling 63.Xr malloc 3 64with a slightly larger request, saving the true beginning of the block 65allocated, and returning a properly aligned pointer. | |
| 66.Sh RETURN VALUES 67The 68.Fn valloc 69function returns 70a pointer to the allocated space if successful; otherwise | 62.Sh RETURN VALUES 63The 64.Fn valloc 65function returns 66a pointer to the allocated space if successful; otherwise |
| 71a null pointer is returned | 67a null pointer is returned. 68.Sh SEE ALSO 69.Xr posix_memalign 3 |
| 72.Sh HISTORY 73The 74.Fn valloc 75function appeared in 76.Bx 3.0 . | 70.Sh HISTORY 71The 72.Fn valloc 73function appeared in 74.Bx 3.0 . |
| 77.Sh BUGS 78A 79.Fn vfree 80function 81has not been implemented. | 75.Pp 76The 77.Fn valloc 78function correctly allocated memory that could be deallocated via 79.Fn free 80in 81.Bx 7.0 . |