XSaveContext() XSaveContext()
Name
XSaveContext - save a data value corresponding to a resource ID and context type (not graphics context).
Synopsis
int XSaveContext(display, rid, context, data)
Display *display;
XID rid;
XContext context;
caddr_t data;
Arguments
display Specifies a connection to an X server; returned from XOpenDisplay().
rid Specifies the ID of the resource with which the data is associated.
context Specifies the context type to which the data corresponds.
data Specifies the data to be associated with the resource and context.
Returns
XCNOMEM (a non-zero error code) if an error has occurred or zero (0) otherwise.
Description
XSaveContext() saves data to the context manager database, according to the specified resource and context ID. The context manager is used
for associating data with windows within an application. The client must have called XUniqueContext() to get the context ID before calling
this function. The meaning of the data is indicated by the context ID, but is completely up to the client.
If an entry with the specified resource and context ID already exists, XSaveContext() writes over it with the specified data.
The XSaveContext() function returns XCNOMEM (a non-zero error code) if an error has occurred and zero (0) otherwise. For more information,
see the description of the context manager in Volume One, Chapter 15, Other Programming Techniques.
Structures
typedef int XContext;
See Also
XDeleteContext(), XFindContext(), XUniqueContext().
Xlib - Context Manager XSaveContext()
Check Out this Related Man Page
XSaveContext(3X11)XSaveContext(3X11)NAME
XSaveContext, XFindContext, XDeleteContext, XUniqueContext - associative look-up routines
SYNOPSIS
int XSaveContext(display, rid, context, data)
Display *display;
XID rid;
XContext context;
XPointer data;
int XFindContext(display, rid, context, data_return)
Display *display;
XID rid;
XContext context;
XPointer *data_return;
int XDeleteContext(display, rid, context)
Display *display;
XID rid;
XContext context;
XContext XUniqueContext()
ARGUMENTS
Specifies the context type to which the data belongs. Specifies the data to be associated with the window and type. Returns the data.
Specifies the connection to the X server. Specifies the resource ID with which the data is associated.
DESCRIPTION
If an entry with the specified resource ID and type already exists, XSaveContext overrides it with the specified context. The XSaveContext
function returns a nonzero error code if an error has occurred and zero otherwise. Possible errors are XCNOMEM (out of memory).
Because it is a return value, the data is a pointer. The XFindContext function returns a nonzero error code if an error has occurred and
zero otherwise. Possible errors are XCNOENT (context-not-found).
The XDeleteContext function deletes the entry for the given resource ID and type from the data structure. This function returns the same
error codes that XFindContext returns if called with the same arguments. XDeleteContext does not free the data whose address was saved.
The XUniqueContext function creates a unique context type that may be used in subsequent calls to XSaveContext.
SEE ALSO
Xlib -- C Language X Interface
XSaveContext(3X11)
Introduction
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