Mercurial > cpython-lru_cache-weakref
view Python/thread_foobar.h @ 64620:25cc226dc9bd
#4617: Previously it was illegal to delete a name from the local
namespace if it occurs as a free variable in a nested block. This limitation
of the compiler has been lifted, and a new opcode introduced (DELETE_DEREF).
This sample was valid in 2.6, but fails to compile in 3.x without this change::
>>> def f():
... def print_error():
... print(e)
... try:
... something
... except Exception as e:
... print_error()
... # implicit "del e" here
This sample has always been invalid in Python, and now works::
>>> def outer(x):
... def inner():
... return x
... inner()
... del x
There is no need to bump the PYC magic number: the new opcode is used
for code that did not compile before.
| author | Amaury Forgeot d'Arc <amauryfa@gmail.com> |
|---|---|
| date | Fri, 10 Sep 2010 21:39:53 +0000 |
| parents | cab14be0ada1 |
| children | b36cb4602e21 |
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/* * Initialization. */ static void PyThread__init_thread(void) { } /* * Thread support. */ long PyThread_start_new_thread(void (*func)(void *), void *arg) { int success = 0; /* init not needed when SOLARIS_THREADS and */ /* C_THREADS implemented properly */ dprintf(("PyThread_start_new_thread called\n")); if (!initialized) PyThread_init_thread(); return success < 0 ? -1 : 0; } long PyThread_get_thread_ident(void) { if (!initialized) PyThread_init_thread(); } void PyThread_exit_thread(void) { dprintf(("PyThread_exit_thread called\n")); if (!initialized) exit(0); } /* * Lock support. */ PyThread_type_lock PyThread_allocate_lock(void) { dprintf(("PyThread_allocate_lock called\n")); if (!initialized) PyThread_init_thread(); dprintf(("PyThread_allocate_lock() -> %p\n", lock)); return (PyThread_type_lock) lock; } void PyThread_free_lock(PyThread_type_lock lock) { dprintf(("PyThread_free_lock(%p) called\n", lock)); } int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag) { int success; dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag)); dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success)); return success; } void PyThread_release_lock(PyThread_type_lock lock) { dprintf(("PyThread_release_lock(%p) called\n", lock)); }
