Xavier de Gaye added the comment:
sem_open() is not implemented as well. Here is a gdb session with a breakpoint
set at semlock_new() (SEM_FAILED is NULL on android):
Breakpoint 1, semlock_new (type=0xb6d070c0 <_PyMp_SemLockType>,
args=(1, 1, 1, '/mp-dkzrq4ed', True), kwds=0x0)
at
/home/xavier/src/packages/android/cpython/Modules/_multiprocessing/semaphore.c:420
420 {
(gdb) next
428 if (!PyArg_ParseTupleAndKeywords(args, kwds, "iiisi", kwlist,
(gdb)
432 if (kind != RECURSIVE_MUTEX && kind != SEMAPHORE) {
(gdb)
437 if (!unlink) {
(gdb)
424 char *name, *name_copy = NULL;
(gdb)
445 handle = SEM_CREATE(name, value, maxvalue);
(gdb)
447 if (handle == SEM_FAILED || SEM_GET_LAST_ERROR() != 0)
(gdb) print handle
$5 = (SEM_HANDLE) 0x0
(gdb) next
460 if (handle != SEM_FAILED)
(gdb)
462 PyMem_Free(name_copy);
(gdb)
463 _PyMp_SetError(NULL, MP_STANDARD_ERROR);
(gdb)
464 return NULL;
(gdb)
This is run with sem_unlink_alt.diff modified to include the change to 'define
SEM_UNLINK(name) 0' although I guess this does not change anything.
Sorry for misleading you about sem_unlink().
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<http://bugs.python.org/issue26924>
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