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authorupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
committerupstream source tree <ports@midipix.org>2015-03-15 20:14:05 -0400
commit554fd8c5195424bdbcabf5de30fdc183aba391bd (patch)
tree976dc5ab7fddf506dadce60ae936f43f58787092 /libffi/man
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Diffstat (limited to 'libffi/man')
-rw-r--r--libffi/man/Makefile.am8
-rw-r--r--libffi/man/Makefile.in410
-rw-r--r--libffi/man/ffi.331
-rw-r--r--libffi/man/ffi_call.3103
-rw-r--r--libffi/man/ffi_prep_cif.366
5 files changed, 618 insertions, 0 deletions
diff --git a/libffi/man/Makefile.am b/libffi/man/Makefile.am
new file mode 100644
index 000000000..251927748
--- /dev/null
+++ b/libffi/man/Makefile.am
@@ -0,0 +1,8 @@
+## Process this with automake to create Makefile.in
+
+AUTOMAKE_OPTIONS=foreign
+
+EXTRA_DIST = ffi.3 ffi_call.3 ffi_prep_cif.3
+
+man_MANS = ffi.3 ffi_call.3 ffi_prep_cif.3
+
diff --git a/libffi/man/Makefile.in b/libffi/man/Makefile.in
new file mode 100644
index 000000000..180e0a258
--- /dev/null
+++ b/libffi/man/Makefile.in
@@ -0,0 +1,410 @@
+# Makefile.in generated by automake 1.11.1 from Makefile.am.
+# @configure_input@
+
+# Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
+# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation,
+# Inc.
+# This Makefile.in is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
+# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+# PARTICULAR PURPOSE.
+
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diff --git a/libffi/man/ffi.3 b/libffi/man/ffi.3
new file mode 100644
index 000000000..18b5d5d2d
--- /dev/null
+++ b/libffi/man/ffi.3
@@ -0,0 +1,31 @@
+.Dd February 15, 2008
+.Dt FFI 3
+.Sh NAME
+.Nm FFI
+.Nd Foreign Function Interface
+.Sh LIBRARY
+libffi, -lffi
+.Sh SYNOPSIS
+.In ffi.h
+.Ft ffi_status
+.Fo ffi_prep_cif
+.Fa "ffi_cif *cif"
+.Fa "ffi_abi abi"
+.Fa "unsigned int nargs"
+.Fa "ffi_type *rtype"
+.Fa "ffi_type **atypes"
+.Fc
+.Ft void
+.Fo ffi_call
+.Fa "ffi_cif *cif"
+.Fa "void (*fn)(void)"
+.Fa "void *rvalue"
+.Fa "void **avalue"
+.Fc
+.Sh DESCRIPTION
+The foreign function interface provides a mechanism by which a function can
+generate a call to another function at runtime without requiring knowledge of
+the called function's interface at compile time.
+.Sh SEE ALSO
+.Xr ffi_prep_cif 3 ,
+.Xr ffi_call 3
diff --git a/libffi/man/ffi_call.3 b/libffi/man/ffi_call.3
new file mode 100644
index 000000000..5351513f9
--- /dev/null
+++ b/libffi/man/ffi_call.3
@@ -0,0 +1,103 @@
+.Dd February 15, 2008
+.Dt ffi_call 3
+.Sh NAME
+.Nm ffi_call
+.Nd Invoke a foreign function.
+.Sh SYNOPSIS
+.In ffi.h
+.Ft void
+.Fo ffi_call
+.Fa "ffi_cif *cif"
+.Fa "void (*fn)(void)"
+.Fa "void *rvalue"
+.Fa "void **avalue"
+.Fc
+.Sh DESCRIPTION
+The
+.Nm ffi_call
+function provides a simple mechanism for invoking a function without
+requiring knowledge of the function's interface at compile time.
+.Fa fn
+is called with the values retrieved from the pointers in the
+.Fa avalue
+array. The return value from
+.Fa fn
+is placed in storage pointed to by
+.Fa rvalue .
+.Fa cif
+contains information describing the data types, sizes and alignments of the
+arguments to and return value from
+.Fa fn ,
+and must be initialized with
+.Nm ffi_prep_cif
+before it is used with
+.Nm ffi_call .
+.Pp
+.Fa rvalue
+must point to storage that is sizeof(ffi_arg) or larger for non-floating point
+types. For smaller-sized return value types, the
+.Nm ffi_arg
+or
+.Nm ffi_sarg
+integral type must be used to hold
+the return value.
+.Sh EXAMPLES
+.Bd -literal
+#include <ffi.h>
+#include <stdio.h>
+
+unsigned char
+foo(unsigned int, float);
+
+int
+main(int argc, const char **argv)
+{
+ ffi_cif cif;
+ ffi_type *arg_types[2];
+ void *arg_values[2];
+ ffi_status status;
+
+ // Because the return value from foo() is smaller than sizeof(long), it
+ // must be passed as ffi_arg or ffi_sarg.
+ ffi_arg result;
+
+ // Specify the data type of each argument. Available types are defined
+ // in <ffi/ffi.h>.
+ arg_types[0] = &ffi_type_uint;
+ arg_types[1] = &ffi_type_float;
+
+ // Prepare the ffi_cif structure.
+ if ((status = ffi_prep_cif(&cif, FFI_DEFAULT_ABI,
+ 2, &ffi_type_uint8, arg_types)) != FFI_OK)
+ {
+ // Handle the ffi_status error.
+ }
+
+ // Specify the values of each argument.
+ unsigned int arg1 = 42;
+ float arg2 = 5.1;
+
+ arg_values[0] = &arg1;
+ arg_values[1] = &arg2;
+
+ // Invoke the function.
+ ffi_call(&cif, FFI_FN(foo), &result, arg_values);
+
+ // The ffi_arg 'result' now contains the unsigned char returned from foo(),
+ // which can be accessed by a typecast.
+ printf("result is %hhu", (unsigned char)result);
+
+ return 0;
+}
+
+// The target function.
+unsigned char
+foo(unsigned int x, float y)
+{
+ unsigned char result = x - y;
+ return result;
+}
+.Ed
+.Sh SEE ALSO
+.Xr ffi 3 ,
+.Xr ffi_prep_cif 3
diff --git a/libffi/man/ffi_prep_cif.3 b/libffi/man/ffi_prep_cif.3
new file mode 100644
index 000000000..9436b3119
--- /dev/null
+++ b/libffi/man/ffi_prep_cif.3
@@ -0,0 +1,66 @@
+.Dd February 15, 2008
+.Dt ffi_prep_cif 3
+.Sh NAME
+.Nm ffi_prep_cif
+.Nd Prepare a
+.Nm ffi_cif
+structure for use with
+.Nm ffi_call
+.
+.Sh SYNOPSIS
+.In ffi.h
+.Ft ffi_status
+.Fo ffi_prep_cif
+.Fa "ffi_cif *cif"
+.Fa "ffi_abi abi"
+.Fa "unsigned int nargs"
+.Fa "ffi_type *rtype"
+.Fa "ffi_type **atypes"
+.Fc
+.Sh DESCRIPTION
+The
+.Nm ffi_prep_cif
+function prepares a
+.Nm ffi_cif
+structure for use with
+.Nm ffi_call
+.
+.Fa abi
+specifies a set of calling conventions to use.
+.Fa atypes
+is an array of
+.Fa nargs
+pointers to
+.Nm ffi_type
+structs that describe the data type, size and alignment of each argument.
+.Fa rtype
+points to an
+.Nm ffi_type
+that describes the data type, size and alignment of the
+return value.
+.Sh RETURN VALUES
+Upon successful completion,
+.Nm ffi_prep_cif
+returns
+.Nm FFI_OK .
+It will return
+.Nm FFI_BAD_TYPEDEF
+if
+.Fa cif
+is
+.Nm NULL
+or
+.Fa atypes
+or
+.Fa rtype
+is malformed. If
+.Fa abi
+does not refer to a valid ABI,
+.Nm FFI_BAD_ABI
+will be returned. Available ABIs are
+defined in
+.Nm <ffitarget.h>
+.
+.Sh SEE ALSO
+.Xr ffi 3 ,
+.Xr ffi_call 3