mirror of
https://github.com/hanzoai/cpy3.git
synced 2026-10-30 18:42:30 +00:00
zeekayandGitHub
aa54594e88
* feat: Python 3.12+/3.13 compat + sub-interpreter wrapper
Hanzo fork of go-python/cpy3. See HANZO_CHANGES.md for full diff.
- Polyfill APIs removed in 3.12 (per-type ClearFreeList helpers) and
3.13 (PyEval_InitThreads, Py_SetPath/PythonHome/ProgramName,
PySys_SetArgv/AddWarnOption/AddXOption/SetPath,
Py_SetStandardStreamEncoding, PyEval_ThreadsInitialized) so existing
call sites compile against modern CPython. Polyfills route to the
PyConfig API where there's a meaningful replacement, return 0/no-op
otherwise.
- New PEP 684 SubInterpreter wrapper (subinterp.go) — recommended
primitive for tenant/per-worker isolation on 3.12+. Defaults follow
PEP 684 (own GIL, threads on, no daemon threads, refuse non-isolated
C extensions). Falls back to Py_NewInterpreter on 3.11 and older.
- Free-threading awareness (PEP 703) — IsGILDisabled() reports at
runtime whether the linked CPython was built with --disable-gil.
- pkg-config switched from "python3" to "python3-embed" so libpython
links cleanly on Linux distros that split the embed flags.
- Module path: github.com/go-python/cpy3 -> github.com/hanzoai/cpy3.
Go 1.21+. Package name (python3) unchanged.
- CI matrix: Python {3.11, 3.12, 3.13} x Go {1.21, 1.22} on Ubuntu.
License remains MIT. Original go-python team credited in HANZO_CHANGES.md
and every modified file's header.
* feat: JSON hot-path helper + 3.13t build script
- LoadSource + CallJSONFunctionByName: single-cgo-crossing helpers
for the common "JSON-in, JSON-out" extension embedding contract.
Roughly 2x faster than the long form via individual wrappers and
stack-safer under sustained load (macOS SIGBUS at ~400k iters of
the 9-call long form is mitigated by collapsing to 1 cgo call).
- ErrUnknownFunction: sentinel error for missing/non-callable
lookups so callers can errors.Is.
- scripts/build-python313t.sh: idempotent local build of CPython
3.13.x with --disable-gil. Writes a python3-embed.pc so callers
steer via PKG_CONFIG_PATH.
- HANZO_CHANGES.md + README updated.
- .gitignore: exclude python313t-build/ python313t-src/.
* ci: split test runs by Python global state
TestSubInterpreter_* and TestCallJSONFunctionByName_* / TestLoadSource_*
share global Py state with the data-type/error tests. Running them
in the same `go test` invocation can hang on darwin after the
data-type tests have already touched the main interpreter. Split
into two test steps so each starts from a fresh process.
* test: move json_hotpath tests in-package + share Py init
Move from package python3_test to package python3 so they share
Py_Initialize() state with subinterp_test.go. Each test pins its
own OS thread, calls Py_Initialize (idempotent), creates a fresh
sub-interp, and unpins on return. No PyEval_SaveThread in teardown
— the sub-interp's Close already released the calling thread's GIL.
This eliminates a SIGSEGV-on-second-test pattern caused by trying
to PyEval_SaveThread a state that's already been saved.
* docs: README example for the JSON hot path
Show LoadSource + CallJSONFunctionByName end-to-end with luxfi/log
for context. The helpers themselves take no logger dependency.
68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
/*
|
|
Unless explicitly stated otherwise all files in this repository are licensed
|
|
under the MIT License.
|
|
This product includes software developed at Datadog (https://www.datadoghq.com/).
|
|
Copyright 2018 Datadog, Inc.
|
|
*/
|
|
|
|
package python3
|
|
|
|
/*
|
|
#cgo pkg-config: python3-embed
|
|
#include "Python.h"
|
|
*/
|
|
import "C"
|
|
import (
|
|
"fmt"
|
|
"unsafe"
|
|
)
|
|
|
|
//Py_Main : https://docs.python.org/3/c-api/veryhigh.html?highlight=pycompilerflags#c.Py_Main
|
|
// "error" will be set if we fail to call "Py_DecodeLocale" on every "args".
|
|
func Py_Main(args []string) (int, error) {
|
|
argc := C.int(len(args))
|
|
argv := make([]*C.wchar_t, argc, argc)
|
|
for i, arg := range args {
|
|
carg := C.CString(arg)
|
|
defer C.free(unsafe.Pointer(carg))
|
|
|
|
warg := C.Py_DecodeLocale(carg, nil)
|
|
if warg == nil {
|
|
return -1, fmt.Errorf("fail to call Py_DecodeLocale on '%s'", arg)
|
|
}
|
|
// Py_DecodeLocale requires a call to PyMem_RawFree to free the memory
|
|
defer C.PyMem_RawFree(unsafe.Pointer(warg))
|
|
argv[i] = warg
|
|
}
|
|
|
|
return int(C.Py_Main(argc, (**C.wchar_t)(unsafe.Pointer(&argv[0])))), nil
|
|
}
|
|
|
|
//PyRun_AnyFile : https://docs.python.org/3/c-api/veryhigh.html?highlight=pycompilerflags#c.PyRun_AnyFile
|
|
// "error" will be set if we fail to open "filename".
|
|
func PyRun_AnyFile(filename string) (int, error) {
|
|
cfilename := C.CString(filename)
|
|
defer C.free(unsafe.Pointer(cfilename))
|
|
|
|
mode := C.CString("r")
|
|
defer C.free(unsafe.Pointer(mode))
|
|
|
|
cfile, err := C.fopen(cfilename, mode)
|
|
if err != nil {
|
|
return -1, fmt.Errorf("fail to open '%s': %s", filename, err)
|
|
}
|
|
defer C.fclose(cfile)
|
|
|
|
// C.PyRun_AnyFile is a macro, using C.PyRun_AnyFileFlags instead
|
|
return int(C.PyRun_AnyFileFlags(cfile, cfilename, nil)), nil
|
|
}
|
|
|
|
//PyRun_SimpleString : https://docs.python.org/3/c-api/veryhigh.html?highlight=pycompilerflags#c.PyRun_SimpleString
|
|
func PyRun_SimpleString(command string) int {
|
|
ccommand := C.CString(command)
|
|
defer C.free(unsafe.Pointer(ccommand))
|
|
|
|
// C.PyRun_SimpleString is a macro, using C.PyRun_SimpleStringFlags instead
|
|
return int(C.PyRun_SimpleStringFlags(ccommand, nil))
|
|
}
|