diff options
Diffstat (limited to 'man')
-rw-r--r-- | man/.svn/entries | 198 | ||||
-rw-r--r-- | man/.svn/text-base/Makefile.am.svn-base | 8 | ||||
-rw-r--r-- | man/.svn/text-base/Makefile.in.svn-base | 456 | ||||
-rw-r--r-- | man/.svn/text-base/ffi.3.svn-base | 31 | ||||
-rw-r--r-- | man/.svn/text-base/ffi_call.3.svn-base | 103 | ||||
-rw-r--r-- | man/.svn/text-base/ffi_prep_cif.3.svn-base | 66 | ||||
-rw-r--r-- | man/Makefile.in | 9 |
7 files changed, 6 insertions, 865 deletions
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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/man/.svn/text-base/ffi_prep_cif.3.svn-base b/man/.svn/text-base/ffi_prep_cif.3.svn-base deleted file mode 100644 index 9436b31..0000000 --- a/man/.svn/text-base/ffi_prep_cif.3.svn-base +++ /dev/null @@ -1,66 +0,0 @@ -.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 diff --git a/man/Makefile.in b/man/Makefile.in index 2903724..2c7c578 100644 --- a/man/Makefile.in +++ b/man/Makefile.in @@ -37,8 +37,10 @@ target_triplet = @target@ subdir = man DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 -am__aclocal_m4_deps = $(top_srcdir)/acinclude.m4 \ - $(top_srcdir)/configure.ac +am__aclocal_m4_deps = $(top_srcdir)/m4/libtool.m4 \ + $(top_srcdir)/m4/ltoptions.m4 $(top_srcdir)/m4/ltsugar.m4 \ + $(top_srcdir)/m4/ltversion.m4 $(top_srcdir)/m4/lt~obsolete.m4 \ + $(top_srcdir)/acinclude.m4 $(top_srcdir)/configure.ac am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \ $(ACLOCAL_M4) mkinstalldirs = $(install_sh) -d @@ -101,6 +103,7 @@ ECHO_N = @ECHO_N@ ECHO_T = @ECHO_T@ EGREP = @EGREP@ EXEEXT = @EXEEXT@ +FFI_EXEC_TRAMPOLINE_TABLE = @FFI_EXEC_TRAMPOLINE_TABLE@ FGREP = @FGREP@ GREP = @GREP@ HAVE_LONG_DOUBLE = @HAVE_LONG_DOUBLE@ @@ -131,7 +134,6 @@ PACKAGE_BUGREPORT = @PACKAGE_BUGREPORT@ PACKAGE_NAME = @PACKAGE_NAME@ PACKAGE_STRING = @PACKAGE_STRING@ PACKAGE_TARNAME = @PACKAGE_TARNAME@ -PACKAGE_URL = @PACKAGE_URL@ PACKAGE_VERSION = @PACKAGE_VERSION@ PATH_SEPARATOR = @PATH_SEPARATOR@ RANLIB = @RANLIB@ @@ -189,6 +191,7 @@ psdir = @psdir@ sbindir = @sbindir@ sharedstatedir = @sharedstatedir@ srcdir = @srcdir@ +sys_symbol_underscore = @sys_symbol_underscore@ sysconfdir = @sysconfdir@ target = @target@ target_alias = @target_alias@ |