Author: Maciej Fijalkowski <[email protected]>
Branch:
Changeset: r69553:acf94ed26643
Date: 2014-02-28 17:43 +0200
http://bitbucket.org/pypy/pypy/changeset/acf94ed26643/
Log: work a bit on this doc
diff --git a/pypy/doc/embedding.rst b/pypy/doc/embedding.rst
--- a/pypy/doc/embedding.rst
+++ b/pypy/doc/embedding.rst
@@ -82,7 +82,7 @@
If we save it as ``x.c`` now, compile it and run it with::
fijal@hermann:/opt/pypy$ gcc -o x x.c -lpypy-c -L.
- fijal@hermann:~/src/pypy$ LD_LIBRARY_PATH=. ./x
+ fijal@hermann:/opt/pypy$ LD_LIBRARY_PATH=. ./x
hello from pypy
Worked!
@@ -92,8 +92,56 @@
Typically we need something more to do than simply execute source. The
following
is a fully fledged example, please consult cffi documentation for details.
+It's a bit longish, but it captures a gist what can be done with the PyPy
+embedding interface::
-xxx
+ #include "include/PyPy.h"
+ #include <stdio.h>
+
+ char source[] = "from cffi import FFI\n\
+ ffi = FFI()\n\
+ @ffi.callback('int(int)')\n\
+ def func(a):\n\
+ print 'Got from C %d' % a\n\
+ return a * 2\n\
+ ffi.cdef('int callback(int (*func)(int));')\n\
+ c_func = ffi.cast('int(*)(int(*)(int))', c_argument)\n\
+ c_func(func)\n\
+ print 'finished the Python part'\n\
+ ";
+
+ int callback(int (*func)(int))
+ {
+ printf("Calling to Python, result: %d\n", func(3));
+ }
+
+ int main()
+ {
+ int res;
+ void *lib, *func;
+
+ rpython_startup_code();
+ res = pypy_setup_home("/opt/pypy/pypy/libpypy-c.so", 1);
+ if (res) {
+ printf("Error setting pypy home!\n");
+ return 1;
+ }
+ res = pypy_execute_source_ptr(source, (void*)callback);
+ if (res) {
+ printf("Error calling pypy_execute_source_ptr!\n");
+ }
+ return res;
+ }
+
+you can compile and run it with::
+
+ fijal@hermann:/opt/pypy$ gcc -g -o x x.c -lpypy-c -L.
+ fijal@hermann:/opt/pypy$ LD_LIBRARY_PATH=. ./x
+ Got from C 3
+ Calling to Python, result: 6
+ finished the Python part
+
+
Threading
---------
_______________________________________________
pypy-commit mailing list
[email protected]
https://mail.python.org/mailman/listinfo/pypy-commit
