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191 lines (158 loc) · 5.72 KB
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// ==========================================================================
// This software is subject to the provisions of the Zope Public License,
// Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
// THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
// WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
// FOR A PARTICULAR PURPOSE.
// ==========================================================================
//
// Author: Christian Heimes <christian(at)cheimes(dot)de>
#include "pynetclr.h"
#ifndef _WIN32
#include "dirent.h"
#endif
// initialize Mono and PythonNet
PyNet_Args* PyNet_Init(int ext) {
PyNet_Args *pn_args;
pn_args = (PyNet_Args *)malloc(sizeof(PyNet_Args));
pn_args->pr_file = PR_ASSEMBLY;
pn_args->error = NULL;
pn_args->shutdown = NULL;
if (ext == 0) {
pn_args->init_name = "Python.Runtime:Initialize()";
} else {
pn_args->init_name = "Python.Runtime:InitExt()";
}
pn_args->shutdown_name = "Python.Runtime:Shutdown()";
pn_args->domain = mono_jit_init_version(MONO_DOMAIN, MONO_VERSION);
/*
* Load the default Mono configuration file, this is needed
* if you are planning on using the dllmaps defined on the
* system configuration
*/
mono_config_parse(NULL);
/* I can't use this call to run the main_thread_handler. The function
* runs it in another thread but *this* thread holds the Python
* import lock -> DEAD LOCK.
*
* mono_runtime_exec_managed_code(pn_args->domain, main_thread_handler,
* pn_args);
*/
main_thread_handler(pn_args);
if (pn_args->error != NULL) {
PyErr_SetString(PyExc_ImportError, pn_args->error);
}
return pn_args;
}
// Shuts down PythonNet and cleans up Mono
void PyNet_Finalize(PyNet_Args *pn_args) {
MonoObject *exception = NULL;
if (pn_args->shutdown) {
mono_runtime_invoke(pn_args->shutdown, NULL, NULL, &exception);
if (exception) {
pn_args->error = PyNet_ExceptionToString(exception);
}
pn_args->shutdown = NULL;
}
if (pn_args->domain) {
mono_jit_cleanup(pn_args->domain);
pn_args->domain = NULL;
}
free(pn_args);
}
MonoMethod *getMethodFromClass(MonoClass *cls, char *name) {
MonoMethodDesc *mdesc;
MonoMethod *method;
mdesc = mono_method_desc_new(name, 1);
method = mono_method_desc_search_in_class(mdesc, cls);
mono_method_desc_free(mdesc);
return method;
}
void main_thread_handler (gpointer user_data) {
PyNet_Args *pn_args=(PyNet_Args *)user_data;
MonoMethod *init;
MonoImage *pr_image;
MonoClass *pythonengine;
MonoObject *exception = NULL;
#ifndef _WIN32
//get python path system variable
PyObject* syspath = PySys_GetObject("path");
char* runtime_full_path = (char*) malloc(1024);
const char* slash = "/";
int found = 0;
int ii = 0;
for (ii = 0; ii < PyList_Size(syspath); ++ii) {
const char* pydir = PyString_AsString(PyList_GetItem(syspath, ii));
char* curdir = (char*) malloc(1024);
strncpy(curdir, strlen(pydir) > 0 ? pydir : ".", 1024);
strncat(curdir, slash, 1024);
//look in this directory for the pn_args->pr_file
DIR* dirp = opendir(curdir);
if (dirp != NULL) {
struct dirent *dp;
while ((dp = readdir(dirp)) != NULL) {
if (strcmp(dp->d_name, pn_args->pr_file) == 0) {
strcpy(runtime_full_path, curdir);
strcat(runtime_full_path, pn_args->pr_file);
found = 1;
break;
}
}
closedir(dirp);
}
free(curdir);
if (found) {
pn_args->pr_file = runtime_full_path;
break;
}
}
if (!found) {
fprintf(stderr, "Could not find assembly %s. \n", pn_args->pr_file);
return;
}
#endif
pn_args->pr_assm = mono_domain_assembly_open(pn_args->domain, pn_args->pr_file);
if (!pn_args->pr_assm) {
pn_args->error = "Unable to load assembly";
return;
}
#ifndef _WIN32
free(runtime_full_path);
#endif
pr_image = mono_assembly_get_image(pn_args->pr_assm);
if (!pr_image) {
pn_args->error = "Unable to get image";
return;
}
pythonengine = mono_class_from_name(pr_image, "Python.Runtime", "PythonEngine");
if (!pythonengine) {
pn_args->error = "Unable to load class PythonEngine from Python.Runtime";
return;
}
init = getMethodFromClass(pythonengine, pn_args->init_name);
if (!init) {
pn_args->error = "Unable to fetch Init method from PythonEngine";
return;
}
pn_args->shutdown = getMethodFromClass(pythonengine, pn_args->shutdown_name);
if (!pn_args->shutdown) {
pn_args->error = "Unable to fetch shutdown method from PythonEngine";
return;
}
mono_runtime_invoke(init, NULL, NULL, &exception);
if (exception) {
pn_args->error = PyNet_ExceptionToString(exception);
return;
}
}
// Get string from a Mono exception
char* PyNet_ExceptionToString(MonoObject *e) {
MonoMethodDesc* mdesc = mono_method_desc_new(":ToString()", FALSE);
MonoMethod* mmethod = mono_method_desc_search_in_class(mdesc, mono_get_object_class());
mono_method_desc_free(mdesc);
mmethod = mono_object_get_virtual_method(e, mmethod);
MonoString* monoString = (MonoString*) mono_runtime_invoke(mmethod, e, NULL, NULL);
mono_runtime_invoke(mmethod, e, NULL, NULL);
return mono_string_to_utf8(monoString);
}