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Code Issues Releases Wiki Activity

research st, expand MD_INIT_CONTEXT macro, the thread start.

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winlin 2014-11-10 13:52:17 +08:00
parent 8da8c49f39
commit 2c01f7e943
5 changed files with 73 additions and 44 deletions
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29
trunk/research/st/sched.c
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@ -553,6 +553,20 @@ _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinabl
* grows downward. Both stacks start in the middle and grow outward
* from each other.
*/
/**
The below comments is by winlin:
The Stack public structure:
+--------------------------------------------------------------+
| stack |
+--------------------------------------------------------------+
bottom top
The code bellow use the stack as:
+-----------------+-----------------+-------------+------------+
| stack of thread |pad+align(128B+) |thread(336B) | keys(128B) |
+-----------------+-----------------+-------------+------------+
bottom sp trd ptds top
(context[0].__jmpbuf.sp) (private_data)
*/
sp = sp - (ST_KEYS_MAX * sizeof(void *));
ptds = (void **) sp;
sp = sp - sizeof(_st_thread_t);
@ -575,8 +589,19 @@ _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinabl
trd->stack = stack;
trd->start = start;
trd->arg = arg;
_ST_INIT_CONTEXT(trd, stack->sp, _st_thread_main);
// by winlin, expand macro MD_INIT_CONTEXT
#if defined(__mips__)
MD_SETJMP((trd)->context);
trd->context[0].__jmpbuf[0].__pc = (__ptr_t) _st_thread_main;
trd->context[0].__jmpbuf[0].__sp = stack->sp;
#else
int ret_setjmp = 0;
if ((ret_setjmp = MD_SETJMP((trd)->context)) != 0) {
_st_thread_main();
}
MD_GET_SP(trd) = (long) (stack->sp);
#endif
/* If thread is joinable, allocate a termination condition variable */
if (joinable) {