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* Makefile adapted to changes below.

Browse source 
* split pythonmain.c in two: most stuff goes to pythonrun.c, in the library.
* new optional built-in threadmodule.c, build upon Sjoerd's thread.{c,h}.
* new module from Sjoerd: mmmodule.c (dynamically loaded).
* new module from Sjoerd: sv (svgen.py, svmodule.c.proto).
* new files thread.{c,h} (from Sjoerd).
* new xxmodule.c (example only).
* myselect.h: bzero -> memset
* select.c: bzero -> memset; removed global variable
This commit is contained in:
Guido van Rossum 1992-08-04 12:41:02 +00:00
parent 4fbf798f86
commit 1984f1e1c6
11 changed files with 1249 additions and 393 deletions
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96
Python/ceval.c
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@ -84,6 +84,79 @@ static object *build_class PROTO((object *, object *));
static frameobject *current_frame;
/* Interface for threads.
A module that plans to do a blocking system call (or something else
that lasts a long time and doesn't touch Python data) can allow other
threads to run as follows:
void *x;
...preparations here...
x = save_thread();
...blocking system call here...
restore_thread(x);
...interpretr result here...
For convenience, that the value of 'errno' is restored across the
the call to restore_thread().
The function init_save_thread() should be called only from
initthread() in "threadmodule.c".
Note that not yet all candidates have been converted to use this
mechanism!
*/
#ifdef USE_THREAD
#include <errno.h>
#include "thread.h"
static type_lock interpreter_lock;
void
init_save_thread()
{
#ifdef USE_THREAD
if (interpreter_lock)
fatal("2nd call to init_save_thread");
interpreter_lock = allocate_lock();
acquire_lock(interpreter_lock, 1);
#endif
}
#endif
void *
save_thread()
{
#ifdef USE_THREAD
if (interpreter_lock) {
void *res;
res = (void *)current_frame;
current_frame = NULL;
release_lock(interpreter_lock);
return res;
}
else
return NULL;
#endif
}
void
restore_thread(x)
void *x;
{
#ifdef USE_THREAD
if (interpreter_lock) {
int err;
err = errno;
acquire_lock(interpreter_lock, 1);
errno = err;
current_frame = (frameobject *)x;
}
#endif
}
/* Status code for main loop (reason for stack unwind) */
enum why_code {
@ -210,17 +283,34 @@ eval_code(co, globals, locals, arg)
for (;;) {
static int ticker;
/* Do periodic things */
/* Do periodic things.
Doing this every time through the loop would add
too much overhead (a function call per instruction).
So we do it only every tenth instruction. */
if (--ticker < 0) {
ticker = 100;
ticker = 10;
if (intrcheck()) {
err_set(KeyboardInterrupt);
why = WHY_EXCEPTION;
goto on_error;
}
#ifdef USE_THREAD
if (interpreter_lock) {
/* Give another thread a chance */
current_frame = NULL;
release_lock(interpreter_lock);
/* Other threads may run now */
acquire_lock(interpreter_lock, 1);
current_frame = f;
}
#endif
}
/* Extract opcode and argument */
opcode = NEXTOP();