* new section Primitive Procedures, documentation for

scm_c_make_gsubr and scm_c_define_gsubr.

doc/ref/ChangeLog

@@ -1,3 +1,8 @@
+2002-08-10  Gary Houston  <ghouston@arglist.com>
+
+	* new section Primitive Procedures, documentation for
+	scm_c_make_gsubr and scm_c_define_gsubr.
+
 2002-08-08  Neil Jerram  <neil@ossau.uklinux.net>
 
 	* gh.texi (Data types and constants defined by gh): Avoid

doc/ref/new-docstrings.texi

@@ -699,3 +699,9 @@ Return NaN.
 @deffnx {C Function} scm_inf ()
 Return Inf.
 @end deffn
+
+@deffn {Scheme Procedure} set-debug-cell-accesses! flag
+@deffnx {C Function} scm_set_debug_cell_accesses_x (flag)
+This function is used to turn on checking for a debug version of GUILE. This version does not support this functionality
+
+@end deffn

doc/ref/scheme-memory.texi

@@ -39,6 +39,7 @@ explicitly.  It is called automatically when appropriate.
 @deffnx {C Function} scm_gc_stats ()
 Return an association list of statistics about Guile's current
 use of storage.
+
 @end deffn
 
 

doc/ref/scheme-procedures.texi

@@ -4,6 +4,7 @@
 
 @menu
 * Lambda::                      Basic procedure creation using lambda.
+* Primitive Procedures::        Procedures defined in C.
 * Optional Arguments::          Handling keyword, optional and rest arguments.
 * Procedure Properties::        Procedure properties and meta-information.
 * Procedures with Setters::     Procedures with setters.
@@ -80,6 +81,42 @@ empty list is stored into the location of the last formal argument.
 order when the procedure is invoked.
 @end deffn
 
+@node Primitive Procedures
+@section Primitive Procedures
+@cindex primitives
+@cindex primitive procedures
+
+Procedures written in C can be registered for use from Scheme,
+provided they take only arguments of type @code{SCM} and return
+@code{SCM} values.  @code{scm_c_define_gsubr} is likely to be the most
+useful mechanism, combining the process of registration
+(@code{scm_c_make_gsubr}) and definition (@code{scm_define}).
+
+@deftypefun SCM scm_c_make_gsubr (const char *name, int req, int opt, int rst, fcn)
+Register a C procedure @var{FCN} as a ``subr'' --- a primitive
+subroutine that can be called from Scheme.  It will be associated with
+the given @var{name} but no environment binding will be created.  The
+arguments @var{req}, @var{opt} and @var{rst} specify the number of
+required, optional and ``rest'' arguments respectively.  The total
+number of these arguments should match the actual number of arguments
+to @var{fcn}.  The number of rest arguments should be 0 or 1.
+@code{scm_c_make_gsubr} returns a value of type @code{SCM} which is a
+``handle'' for the procedure.
+@end deftypefun
+
+@deftypefun SCM scm_c_define_gsubr (const char *name, int req, int opt, int rst, fcn)
+Register a C procedure @var{FCN}, as for @code{scm_c_make_gsubr}
+above, and additionally create a top-level Scheme binding for the
+procedure in the ``current environment'' using @code{scm_define}.
+@code{scm_c_define_gsubr} returns a handle for the procedure in the
+same way as @code{scm_c_make_gsubr}, which is usually not further
+required.
+@end deftypefun
+
+@code{scm_c_make_gsubr} and @code{scm_c_define_gsubr} automatically
+use @code{scm_c_make_subr} and also @code{scm_makcclo} if necessary.
+It is advisable to use the gsubr variants since they provide a
+slightly higher-level abstraction of the Guile implementation.
 
 @node Optional Arguments
 @section Optional Arguments