Implement #791: dynamically load python27.dll from DLLs/ directory
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@ -12,6 +12,17 @@
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#include <Python.h>
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#define PYTHON_DLL_PATH "\\Dlls\\python27.dll"
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static void (*py_initialize)(void) = 0;
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static void (*py_finalize)(void) = 0;
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static void (*py_set_program_name)(char *) = 0;
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static void (*py_set_python_home)(char *) = 0;
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static int (*py_run_simple_string_flags)(const char *, PyCompilerFlags *) = 0;
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static void (*py_sys_set_argv_ex)(int, char **, int) = 0;
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static int (*py_main)(int, char **) = 0;
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static int *py_ignore_environment_flag = 0;
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static const char *run_openslides_code =
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"import openslides_gui.gui;"
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"openslides_gui.gui.main()";
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@ -71,14 +82,94 @@ _get_module_name()
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return NULL;
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}
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static void
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_fatal_error(const char *text)
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{
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MessageBoxA(NULL, text, "Fatal error", MB_OK | MB_ICONERROR);
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exit(1);
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}
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static void
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_fatal_error_fmt(const char *fmt, ...)
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{
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int size = 512;
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char *buf = malloc(size);
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va_list args;
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int bytes_written;
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if (!buf)
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abort();
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va_start(args, fmt);
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for (;;)
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{
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bytes_written = vsnprintf(buf, size, fmt, args);
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if (bytes_written > -1 && bytes_written < size)
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break;
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else if (bytes_written > size)
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size = bytes_written + 1;
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else
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size *= 2;
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buf = realloc(buf, size);
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if (!buf)
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abort();
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}
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va_end(args);
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_fatal_error(buf);
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}
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static void *
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_load_func(HMODULE module, const char *name)
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{
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void *address = GetProcAddress(module, name);
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if (!address)
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_fatal_error_fmt("Failed to look up symbol %s", name);
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return address;
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}
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static void
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_load_python(const char *pyhome)
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{
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size_t pyhome_len = strlen(pyhome);
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size_t size = pyhome_len + strlen(PYTHON_DLL_PATH) + 1;
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char *buf = malloc(size);
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HMODULE py_dll;
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if (!buf)
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abort();
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memcpy(buf, pyhome, pyhome_len);
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memcpy(buf + pyhome_len, PYTHON_DLL_PATH, sizeof(PYTHON_DLL_PATH));
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buf[size - 1] = '\0';
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py_dll = LoadLibrary(buf);
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if (!py_dll)
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{
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DWORD error = GetLastError();
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_fatal_error_fmt("Failed to load %s (error %d)", buf, error);
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}
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py_initialize = (void (*)(void))_load_func(py_dll, "Py_Initialize");
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py_finalize = (void (*)(void))_load_func(py_dll, "Py_Finalize");
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py_set_program_name = (void (*)(char *))
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_load_func(py_dll, "Py_SetProgramName");
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py_set_python_home = (void (*)(char *))
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_load_func(py_dll, "Py_SetPythonHome");
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py_run_simple_string_flags = (int (*)(const char *, PyCompilerFlags *))
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_load_func(py_dll, "PyRun_SimpleStringFlags");
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py_sys_set_argv_ex = (void (*)(int, char **, int))
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_load_func(py_dll, "PySys_SetArgvEx");
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py_main = (int (*)(int, char **))_load_func(py_dll, "Py_Main");
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py_ignore_environment_flag = (int *)
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_load_func(py_dll, "Py_IgnoreEnvironmentFlag");
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}
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static int
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_run()
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{
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if (PyRun_SimpleString(run_openslides_code) != 0)
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{
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fprintf(stderr, "ERROR: failed to execute openslides\n");
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return 1;
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}
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if (py_run_simple_string_flags(run_openslides_code, NULL) != 0)
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_fatal_error("Failed to execute openslides");
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return 0;
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}
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@ -91,33 +182,33 @@ WinMain(HINSTANCE inst, HINSTANCE prev_inst, LPSTR cmdline, int show)
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int run_py_main = __argc > 1;
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char *py_home, *sep = NULL;
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Py_SetProgramName(__argv[0]);
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py_home = _get_module_name();
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if (!py_home)
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_fatal_error("Could not determine portable root directory");
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if (py_home)
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sep = strrchr(py_home, '\\');
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sep = strrchr(py_home, '\\');
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/* should always be the true */
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if (sep)
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{
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*sep = '\0';
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Py_SetPythonHome(py_home);
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Py_IgnoreEnvironmentFlag = 1;
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}
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_load_python(py_home);
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py_set_program_name(__argv[0]);
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py_set_python_home(py_home);
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*py_ignore_environment_flag = 1;
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if (run_py_main)
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{
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/* we where given extra arguments, behave like python.exe */
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returncode = Py_Main(__argc, __argv);
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returncode = py_main(__argc, __argv);
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}
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else
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{
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/* no arguments given => start openslides gui */
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Py_Initialize();
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PySys_SetArgvEx(__argc, __argv, 0);
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py_initialize();
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py_sys_set_argv_ex(__argc, __argv, 0);
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returncode = _run();
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Py_Finalize();
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py_finalize();
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}
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free(py_home);
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@ -318,7 +318,7 @@ def compile_openslides_launcher():
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return False
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cc.add_include_dir(distutils.sysconfig.get_python_inc())
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cc.add_library_dir(os.path.join(sys.exec_prefix, "Libs"))
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cc.define_macro("_CRT_SECURE_NO_WARNINGS")
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gui_data_dir = os.path.dirname(openslides_gui.__file__)
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gui_data_dir = os.path.join(gui_data_dir, "data")
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@ -343,7 +343,8 @@ def compile_openslides_launcher():
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])
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cc.link_executable(
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objs, "extras/win32-portable/openslides",
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extra_preargs=["/subsystem:windows"],
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extra_preargs=["/subsystem:windows", "/nodefaultlib:python27.lib"],
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libraries = ["user32"]
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)
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return True
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@ -361,7 +362,7 @@ def copy_dlls(odir):
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pydllname = "python{0}{1}.dll".format(*sys.version_info[:2])
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src = os.path.join(os.environ["WINDIR"], "System32", pydllname)
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dest = os.path.join(odir, pydllname)
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dest = os.path.join(dll_dest, pydllname)
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shutil.copyfile(src, dest)
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