Mercurial > cpython-lru_cache-weakref
view Python/thread_foobar.h @ 54297:dddf424bd669 legacy-trunk
Issue #6042:
lnotab-based tracing is very complicated and isn't documented very well. There
were at least 3 comment blocks purporting to document co_lnotab, and none did a
very good job. This patch unifies them into Objects/lnotab_notes.txt which
tries to completely capture the current state of affairs.
I also discovered that we've attached 2 layers of patches to the basic tracing
scheme. The first layer avoids jumping to instructions that don't start a line,
to avoid problems in if statements and while loops. The second layer
discovered that jumps backward do need to trace at instructions that don't
start a line, so it added extra lnotab entries for 'while' and 'for' loops, and
added a special case for backward jumps within the same line. I replaced these
patches by just treating forward and backward jumps differently.
| author | Jeffrey Yasskin <jyasskin@gmail.com> |
|---|---|
| date | Sat, 23 May 2009 23:23:01 +0000 |
| parents | 8b116a8449bd |
| children | e38335d4df91 df5719c298db |
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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(); } static void do_PyThread_exit_thread(int no_cleanup) { dprintf(("PyThread_exit_thread called\n")); if (!initialized) if (no_cleanup) _exit(0); else exit(0); } void PyThread_exit_thread(void) { do_PyThread_exit_thread(0); } void PyThread__exit_thread(void) { do_PyThread_exit_thread(1); } #ifndef NO_EXIT_PROG static void do_PyThread_exit_prog(int status, int no_cleanup) { dprintf(("PyThread_exit_prog(%d) called\n", status)); if (!initialized) if (no_cleanup) _exit(status); else exit(status); } void PyThread_exit_prog(int status) { do_PyThread_exit_prog(status, 0); } void PyThread__exit_prog(int status) { do_PyThread_exit_prog(status, 1); } #endif /* NO_EXIT_PROG */ /* * 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)); }
