223 lines
4.1 KiB
Plaintext
223 lines
4.1 KiB
Plaintext
.ds tk X Toolkit
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.ds xT X Toolkit Intrinsics \- C Language Interface
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.ds xI Intrinsics
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.ds xW X Toolkit Athena Widgets \- C Language Interface
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.ds xL Xlib \- C Language X Interface
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.ds xC Inter-Client Communication Conventions Manual
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.ds Rn 3
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.ds Vn 2.2
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.hw XtMake-Geometry-Request XtQuery-Geometry wid-get
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.na
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.de Ds
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.nf
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.\\$1D \\$2 \\$1
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.ft 1
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.ps \\n(PS
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.\".if \\n(VS>=40 .vs \\n(VSu
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.\".if \\n(VS<=39 .vs \\n(VSp
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..
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.de De
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.ce 0
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.if \\n(BD .DF
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.nr BD 0
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.in \\n(OIu
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.if \\n(TM .ls 2
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.sp \\n(DDu
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.fi
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..
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.de FD
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.LP
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.KS
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.TA .5i 3i
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.ta .5i 3i
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.nf
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..
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.de FN
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.fi
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.KE
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.LP
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..
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.de IN \" send an index entry to the stderr
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..
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.de C{
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.KS
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.nf
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.D
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.\"
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.\" choose appropriate monospace font
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.\" the imagen conditional, 480,
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.\" may be changed to L if LB is too
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.\" heavy for your eyes...
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.\"
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.ie "\\*(.T"480" .ft L
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.el .ie "\\*(.T"300" .ft L
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.el .ie "\\*(.T"202" .ft PO
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..
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.de C}
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.DE
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.R
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..
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.de Pn
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.ie t \\$1\fB\^\\$2\^\fR\\$3
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.el \\$1\fI\^\\$2\^\fP\\$3
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..
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.de ZN
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.ie t \fB\^\\$1\^\fR\\$2
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.el \fI\^\\$1\^\fP\\$2
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..
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.de NT
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.ne 7
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.ds NO Note
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.if \\n(.$>$1 .if !'\\$2'C' .ds NO \\$2
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.if \\n(.$ .if !'\\$1'C' .ds NO \\$1
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.ie n .sp
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.el .sp 10p
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.TB
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.ce
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.if '\\$1'C' .ce 99
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.in +5n
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.ll -5n
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.R
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..
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. \" Note End -- doug kraft 3/85
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.de NE
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.ce 0
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.in -5n
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.ie n .sp
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.el .sp 10p
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..
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.ny0
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.TH XtMalloc 3Xt "Release 3" "X Version 11" "XT FUNCTIONS"
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.SH NAME
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XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString \- memory management functions
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.SH SYNTAX
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char *XtMalloc(\fIsize\fP);
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.br
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Cardinal \fIsize\fP;
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.LP
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char *XtCalloc(\fInum\fP, \fIsize\fP);
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.br
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Cardinal \fInum\fP;
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.br
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Cardinal \fIsize\fP;
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.LP
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char *XtRealloc(\fIptr\fP, \fInum\fP);
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.br
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char *\fIptr\fP;
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.br
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Cardinal \fInum\fP;
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.LP
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void XtFree(\fIptr\fP);
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.br
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char *\fIptr\fP;
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.LP
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\fItype\fP *XtNew(\fItype\fP);
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.br
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\fItype\fP;
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.LP
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String XtNewString(\fIstring\fP);
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.br
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String \fIstring\fP;
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.SH ARGUMENTS
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.IP \fInum\fP 1i
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Specifies the number of bytes or array elements.
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.ds Po to the old storage or to the block of storage that is to be freed
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.IP \fIptr\fP 1i
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Specifies a pointer \*(Po.
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.IP \fIsize\fP 1i
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Specifies the size of an array element (in bytes) or the number of bytes
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desired.
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.IP \fIstring\fP 1i
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Specifies a previously declared string.
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.IP \fItype\fP 1i
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Specifies a previously declared data type.
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.SH DESCRIPTION
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The
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.ZN XtMalloc
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functions returns a pointer to a block of storage of at least
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the specified size bytes.
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If there is insufficient memory to allocate the new block,
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.ZN XtMalloc
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calls
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.ZN XtErrorMsg .
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.LP
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The
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.ZN XtCalloc
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function allocates space for the specified number of array elements
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of the specified size and initializes the space to zero.
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If there is insufficient memory to allocate the new block,
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.ZN XtCalloc
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calls
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.ZN XtErrorMsg .
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.LP
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The
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.ZN XtRealloc
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function changes the size of a block of storage (possibly moving it).
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Then, it copies the old contents (or as much as will fit) into the new block
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and frees the old block.
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If there is insufficient memory to allocate the new block,
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.ZN XtRealloc
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calls
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.ZN XtErrorMsg .
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If ptr is NULL,
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.ZN XtRealloc
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allocates the new storage without copying the old contents;
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that is, it simply calls
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.ZN XtMalloc .
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.LP
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The
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.ZN XtFree
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function returns storage and allows it to be reused.
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If ptr is NULL,
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.ZN XtFree
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returns immediately.
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.LP
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.ZN XtNew
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returns a pointer to the allocated storage.
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If there is insufficient memory to allocate the new block,
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.ZN XtNew
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calls
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.ZN XtErrorMsg .
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.ZN XtNew
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is a convenience macro that calls
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.ZN XtMalloc
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with the following arguments specified:
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.LP
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.Ds
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.TA .5i
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.ta .5i
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((type *) XtMalloc((unsigned) sizeof(type))
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.De
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.LP
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.ZN XtNewString
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returns a pointer to the allocated storage.
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If there is insufficient memory to allocate the new block,
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.ZN XtNewString
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calls
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.ZN XtErrorMsg .
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.ZN XtNewString
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is a convenience macro that calls
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.ZN XtMalloc
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with the following arguments specified:
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.LP
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.Ds
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.TA .5i
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.ta .5i
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(strcpy(XtMalloc((unsigned) strlen(str) + 1), str))
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.De
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.SH "SEE ALSO"
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.br
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\fI\*(xT\fP
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.br
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\fI\*(xL\fP
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