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python/Python/thread_os2.h at master · filippsen/python · GitHub
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/* This code implemented by cvale@netcom.com */
#define
INCL_DOSPROCESS
#define
INCL_DOSSEMAPHORES
#include
"os2.h"
#include
"limits.h"
#include
"process.h"
#if
defined(
PYCC_GCC
)
#include
<sys/builtin.h>
#include
<sys/fmutex.h>
#else
long
PyThread_get_thread_ident
(
void
);
#endif
/* default thread stack size of 64kB */
#if
!defined(
THREAD_STACK_SIZE
)
#define
THREAD_STACK_SIZE
0x10000
#endif
#define
OS2_STACKSIZE
(
x
) (x ? x : THREAD_STACK_SIZE)
/*
* Initialization of the C package, should not be needed.
*/
static
void
PyThread__init_thread
(
void
)
{
}
/*
* Thread support.
*/
long
PyThread_start_new_thread
(
void
(
*
func
)(
void
*
),
void
*
arg
)
{
int
thread_id
;
thread_id
=
_beginthread
(
func
,
NULL
,
OS2_STACKSIZE
(
_pythread_stacksize
),
arg
);
if
(
thread_id
==
-1
) {
dprintf
((
"_beginthread failed. return %ld\n"
,
errno
));
}
return
thread_id
;
}
long
PyThread_get_thread_ident
(
void
)
{
#if
!defined(
PYCC_GCC
)
PPIB
pib
;
PTIB
tib
;
#endif
if
(!
initialized
)
PyThread_init_thread
();
#if
defined(
PYCC_GCC
)
return
_gettid
();
#else
DosGetInfoBlocks
(
&
tib
,
&
pib
);
return
tib
->
tib_ptib2
->
tib2_ultid
;
#endif
}
static
void
do_PyThread_exit_thread
(
int
no_cleanup
)
{
dprintf
((
"%ld: PyThread_exit_thread called\n"
,
PyThread_get_thread_ident
()));
if
(!
initialized
)
if
(
no_cleanup
)
_exit
(
0
);
else
exit
(
0
);
_endthread
();
}
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. This is implemented with an event semaphore and critical
* sections to make it behave more like a posix mutex than its OS/2
* counterparts.
*/
typedef
struct
os2_lock_t
{
int
is_set
;
HEV
changed
;
}
*
type_os2_lock
;
PyThread_type_lock
PyThread_allocate_lock
(
void
)
{
#if
defined(
PYCC_GCC
)
_fmutex
*
sem
=
malloc
(
sizeof
(
_fmutex
));
if
(!
initialized
)
PyThread_init_thread
();
dprintf
((
"%ld: PyThread_allocate_lock() -> %lx\n"
,
PyThread_get_thread_ident
(),
(
long
)
sem
));
if
(
_fmutex_create
(
sem
,
0
)) {
free
(
sem
);
sem
=
NULL
;
}
return
(
PyThread_type_lock
)
sem
;
#else
APIRET
rc
;
type_os2_lock
lock
=
(
type_os2_lock
)
malloc
(
sizeof
(
struct
os2_lock_t
));
dprintf
((
"PyThread_allocate_lock called\n"
));
if
(!
initialized
)
PyThread_init_thread
();
lock
->
is_set
=
0
;
DosCreateEventSem
(
NULL
,
&
lock
->
changed
,
0
,
0
);
dprintf
((
"%ld: PyThread_allocate_lock() -> %p\n"
,
PyThread_get_thread_ident
(),
lock
->
changed
));
return
(
PyThread_type_lock
)
lock
;
#endif
}
void
PyThread_free_lock
(
PyThread_type_lock
aLock
)
{
#if
!defined(
PYCC_GCC
)
type_os2_lock
lock
=
(
type_os2_lock
)
aLock
;
#endif
dprintf
((
"%ld: PyThread_free_lock(%p) called\n"
,
PyThread_get_thread_ident
(),
aLock
));
#if
defined(
PYCC_GCC
)
if
(
aLock
) {
_fmutex_close
((
_fmutex
*
)
aLock
);
free
((
_fmutex
*
)
aLock
);
}
#else
DosCloseEventSem
(
lock
->
changed
);
free
(
aLock
);
#endif
}
/*
* Return 1 on success if the lock was acquired
*
* and 0 if the lock was not acquired.
*/
int
PyThread_acquire_lock
(
PyThread_type_lock
aLock
,
int
waitflag
)
{
#if
!defined(
PYCC_GCC
)
int
done
=
0
;
ULONG
count
;
PID
pid
=
0
;
TID
tid
=
0
;
type_os2_lock
lock
=
(
type_os2_lock
)
aLock
;
#endif
dprintf
((
"%ld: PyThread_acquire_lock(%p, %d) called\n"
,
PyThread_get_thread_ident
(),
aLock
,
waitflag
));
#if
defined(
PYCC_GCC
)
/* always successful if the lock doesn't exist */
if
(
aLock
&&
_fmutex_request
((
_fmutex
*
)
aLock
,
waitflag
?
0
:
_FMR_NOWAIT
))
return
0
;
#else
while
(!
done
) {
/* if the lock is currently set, we have to wait for
* the state to change
*/
if
(
lock
->
is_set
) {
if
(!
waitflag
)
return
0
;
DosWaitEventSem
(
lock
->
changed
,
SEM_INDEFINITE_WAIT
);
}
/* enter a critical section and try to get the semaphore. If
* it is still locked, we will try again.
*/
if
(
DosEnterCritSec
())
return
0
;
if
(!
lock
->
is_set
) {
lock
->
is_set
=
1
;
DosResetEventSem
(
lock
->
changed
,
&
count
);
done
=
1
;
}
DosExitCritSec
();
}
#endif
return
1
;
}
void
PyThread_release_lock
(
PyThread_type_lock
aLock
)
{
#if
!defined(
PYCC_GCC
)
type_os2_lock
lock
=
(
type_os2_lock
)
aLock
;
#endif
dprintf
((
"%ld: PyThread_release_lock(%p) called\n"
,
PyThread_get_thread_ident
(),
aLock
));
#if
defined(
PYCC_GCC
)
if
(
aLock
)
_fmutex_release
((
_fmutex
*
)
aLock
);
#else
if
(!
lock
->
is_set
) {
dprintf
((
"%ld: Could not PyThread_release_lock(%p) error: %l\n"
,
PyThread_get_thread_ident
(),
aLock
,
GetLastError
()));
return
;
}
if
(
DosEnterCritSec
()) {
dprintf
((
"%ld: Could not PyThread_release_lock(%p) error: %l\n"
,
PyThread_get_thread_ident
(),
aLock
,
GetLastError
()));
return
;
}
lock
->
is_set
=
0
;
DosPostEventSem
(
lock
->
changed
);
DosExitCritSec
();
#endif
}
/* minimum/maximum thread stack sizes supported */
#define
THREAD_MIN_STACKSIZE
0x8000
/* 32kB */
#define
THREAD_MAX_STACKSIZE
0x2000000
/* 32MB */
/* set the thread stack size.
* Return 0 if size is valid, -1 otherwise.
*/
static
int
_pythread_os2_set_stacksize
(
size_t
size
)
{
/* set to default */
if
(
size
==
0
) {
_pythread_stacksize
=
0
;
return
0
;
}
/* valid range? */
if
(
size
>=
THREAD_MIN_STACKSIZE
&&
size
<
THREAD_MAX_STACKSIZE
) {
_pythread_stacksize
=
size
;
return
0
;
}
return
-1
;
}
#define
THREAD_SET_STACKSIZE
(
x
) _pythread_os2_set_stacksize(x)
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