X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~mdw/git/mLib/blobdiff_plain/8f45ff6cb9a269fc6f8f631908f93b4c8123419c..4aee39a18184ae8595936a03ad254c27d149a0eb:/alloc.3

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+.\" -*-nroff-*-
+.TH alloc 3 "8 May 1999" "Straylight/Edgeware" "mLib utilities library"
+.\" @xmalloc
+.\" @xrealloc
+.\" @xstrdup
+.\" @xfree
+.\" @x_alloc
+.\" @x_strdup
+.\" @x_realloc
+.\" @x_free
+.SH NAME
+alloc \- mLib low-level memory allocation
+.SH SYNOPSIS
+.nf
+.B "#include <mLib/alloc.h>"
+
+.BI "void *x_alloc(arena *" a ", size_t " sz );
+.BI "char *x_strdup(arena *" a ", const char *" s );
+.BI "void *x_realloc(arena *" a ", void *" p ", size_t " sz ", size_t " osz );
+.BI "void x_free(arena *" a ", void *" p );
+
+.BI "void *xmalloc(size_t " sz );
+.BI "void *xrealloc(void *" p ", size_t " sz ", size_t " osz );
+.BI "char *xstrdup(const char *" s );
+.BI "void xfree(void *" p );
+.fi
+.SH DESCRIPTION
+These functions allocate and return blocks of memory.  If insufficient
+memory is available, an
+.B EXC_NOMEM
+exception is raised.
+.PP
+The functions
+.BR x_alloc ,
+.BR x_realloc ,
+.BR x_strdup
+and
+.BR x_free
+work with a given arena (see
+.BR arena (3)).
+.B x_alloc
+allocates a block of a given size;
+.B x_realloc
+resizes an allocated block;
+.B x_strdup
+allocates a copy of a null-terminated string; and
+.B x_free
+releases a block.
+.RB ( x_free
+is supplied for orthogonality's sake: it's equivalent to calling the
+.BR A_FREE (3)
+macro.)
+.PP
+The
+.BR xmalloc ,
+.BR xrealloc ,
+.BR xstrdup
+and
+.BR xfree
+macros are provided as a convenient interface to failsafe memory
+allocation from the current arena
+.BR arena_global (3).
+.SH "SEE ALSO"
+.BR arena (3),
+.BR exc (3),
+.BR mLib (3).
+.SH AUTHOR
+Mark Wooding, <mdw@distorted.org.uk>
+