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research st, rename variable thread to trd, for thread is a keyword.

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winlin 2014-11-10 11:06:06 +08:00
parent ac1a4ec0a3
commit e49a868308
3 changed files with 189 additions and 120 deletions
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4
trunk/research/st/public.h
View file

@ -95,8 +95,8 @@ extern "C" {
extern st_thread_t st_thread_self(void);
extern void st_thread_exit(void *retval);
extern int st_thread_join(st_thread_t thread, void **retvalp);
extern void st_thread_interrupt(st_thread_t thread);
extern int st_thread_join(st_thread_t trd, void **retvalp);
extern void st_thread_interrupt(st_thread_t trd);
extern st_thread_t st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stack_size);
extern int st_randomize_stacks(int on);
extern int st_set_utime_function(st_utime_t (*func)(void));

230
trunk/research/st/sched.c
View file

@ -110,21 +110,21 @@ int st_poll(struct pollfd *pds, int npds, st_utime_t timeout)
void _st_vp_schedule(void)
{
_st_thread_t *thread;
_st_thread_t *trd;
if (_ST_RUNQ.next != &_ST_RUNQ) {
/* Pull thread off of the run queue */
thread = _ST_THREAD_PTR(_ST_RUNQ.next);
_ST_DEL_RUNQ(thread);
trd = _ST_THREAD_PTR(_ST_RUNQ.next);
_ST_DEL_RUNQ(trd);
} else {
/* If there are no threads to run, switch to the idle thread */
thread = _st_this_vp.idle_thread;
trd = _st_this_vp.idle_thread;
}
ST_ASSERT(thread->state == _ST_ST_RUNNABLE);
ST_ASSERT(trd->state == _ST_ST_RUNNABLE);
/* Resume the thread */
thread->state = _ST_ST_RUNNING;
_ST_RESTORE_CONTEXT(thread);
trd->state = _ST_ST_RUNNING;
_ST_RESTORE_CONTEXT(trd);
}
/*
@ -132,7 +132,7 @@ void _st_vp_schedule(void)
*/
int st_init(void)
{
_st_thread_t *thread;
_st_thread_t *trd;
if (_st_active_count) {
/* Already initialized */
@ -176,18 +176,18 @@ int st_init(void)
/*
* Initialize primordial thread
*/
thread = (_st_thread_t *) calloc(1, sizeof(_st_thread_t) +
trd = (_st_thread_t *) calloc(1, sizeof(_st_thread_t) +
(ST_KEYS_MAX * sizeof(void *)));
if (!thread) {
if (!trd) {
return -1;
}
thread->private_data = (void **) (thread + 1);
thread->state = _ST_ST_RUNNING;
thread->flags = _ST_FL_PRIMORDIAL;
_ST_SET_CURRENT_THREAD(thread);
trd->private_data = (void **) (trd + 1);
trd->state = _ST_ST_RUNNING;
trd->flags = _ST_FL_PRIMORDIAL;
_ST_SET_CURRENT_THREAD(trd);
_st_active_count++;
#ifdef DEBUG
_ST_ADD_THREADQ(thread);
_ST_ADD_THREADQ(trd);
#endif
return 0;
@ -237,50 +237,50 @@ void *_st_idle_thread_start(void *arg)
void st_thread_exit(void *retval)
{
_st_thread_t *thread = _ST_CURRENT_THREAD();
_st_thread_t *trd = _ST_CURRENT_THREAD();
thread->retval = retval;
_st_thread_cleanup(thread);
trd->retval = retval;
_st_thread_cleanup(trd);
_st_active_count--;
if (thread->term) {
if (trd->term) {
/* Put thread on the zombie queue */
thread->state = _ST_ST_ZOMBIE;
_ST_ADD_ZOMBIEQ(thread);
trd->state = _ST_ST_ZOMBIE;
_ST_ADD_ZOMBIEQ(trd);
/* Notify on our termination condition variable */
st_cond_signal(thread->term);
st_cond_signal(trd->term);
/* Switch context and come back later */
_ST_SWITCH_CONTEXT(thread);
_ST_SWITCH_CONTEXT(trd);
/* Continue the cleanup */
st_cond_destroy(thread->term);
thread->term = NULL;
st_cond_destroy(trd->term);
trd->term = NULL;
}
#ifdef DEBUG
_ST_DEL_THREADQ(thread);
_ST_DEL_THREADQ(trd);
#endif
if (!(thread->flags & _ST_FL_PRIMORDIAL)) {
_st_stack_free(thread->stack);
if (!(trd->flags & _ST_FL_PRIMORDIAL)) {
_st_stack_free(trd->stack);
}
/* Find another thread to run */
_ST_SWITCH_CONTEXT(thread);
_ST_SWITCH_CONTEXT(trd);
/* Not going to land here */
}
int st_thread_join(_st_thread_t *thread, void **retvalp)
int st_thread_join(_st_thread_t *trd, void **retvalp)
{
_st_cond_t *term = thread->term;
_st_cond_t *term = trd->term;
/* Can't join a non-joinable thread */
if (term == NULL) {
errno = EINVAL;
return -1;
}
if (_ST_CURRENT_THREAD() == thread) {
if (_ST_CURRENT_THREAD() == trd) {
errno = EDEADLK;
return -1;
}
@ -291,43 +291,43 @@ int st_thread_join(_st_thread_t *thread, void **retvalp)
return -1;
}
while (thread->state != _ST_ST_ZOMBIE) {
while (trd->state != _ST_ST_ZOMBIE) {
if (st_cond_timedwait(term, ST_UTIME_NO_TIMEOUT) != 0) {
return -1;
}
}
if (retvalp) {
*retvalp = thread->retval;
*retvalp = trd->retval;
}
/*
* Remove target thread from the zombie queue and make it runnable.
* When it gets scheduled later, it will do the clean up.
*/
thread->state = _ST_ST_RUNNABLE;
_ST_DEL_ZOMBIEQ(thread);
_ST_ADD_RUNQ(thread);
trd->state = _ST_ST_RUNNABLE;
_ST_DEL_ZOMBIEQ(trd);
_ST_ADD_RUNQ(trd);
return 0;
}
void _st_thread_main(void)
{
_st_thread_t *thread = _ST_CURRENT_THREAD();
_st_thread_t *trd = _ST_CURRENT_THREAD();
/*
* Cap the stack by zeroing out the saved return address register
* value. This allows some debugging/profiling tools to know when
* to stop unwinding the stack. It's a no-op on most platforms.
*/
MD_CAP_STACK(&thread);
MD_CAP_STACK(&trd);
/* Run thread main */
thread->retval = (*thread->start)(thread->arg);
trd->retval = (*trd->start)(trd->arg);
/* All done, time to go away */
st_thread_exit(thread->retval);
st_thread_exit(trd->retval);
}
/*
@ -335,9 +335,9 @@ void _st_thread_main(void)
* specified by thread->heap_index. See docs/timeout_heap.txt
* for details about the timeout heap.
*/
static _st_thread_t **heap_insert(_st_thread_t *thread)
static _st_thread_t **heap_insert(_st_thread_t *trd)
{
int target = thread->heap_index;
int target = trd->heap_index;
int s = target;
_st_thread_t **p = &_ST_SLEEPQ;
int bits = 0;
@ -350,13 +350,13 @@ static _st_thread_t **heap_insert(_st_thread_t *thread)
}
for (bit = bits - 2; bit >= 0; bit--) {
if (thread->due < (*p)->due) {
if (trd->due < (*p)->due) {
_st_thread_t *t = *p;
thread->left = t->left;
thread->right = t->right;
*p = thread;
thread->heap_index = index;
thread = t;
trd->left = t->left;
trd->right = t->right;
*p = trd;
trd->heap_index = index;
trd = t;
}
index <<= 1;
if (target & (1 << bit)) {
@ -367,9 +367,9 @@ static _st_thread_t **heap_insert(_st_thread_t *thread)
}
}
thread->heap_index = index;
*p = thread;
thread->left = thread->right = NULL;
trd->heap_index = index;
*p = trd;
trd->left = trd->right = NULL;
return p;
}
@ -377,7 +377,7 @@ static _st_thread_t **heap_insert(_st_thread_t *thread)
/*
* Delete "thread" from the timeout heap.
*/
static void heap_delete(_st_thread_t *thread)
static void heap_delete(_st_thread_t *trd)
{
_st_thread_t *t, **p;
int bits = 0;
@ -402,15 +402,15 @@ static void heap_delete(_st_thread_t *thread)
t = *p;
*p = NULL;
--_ST_SLEEPQ_SIZE;
if (t != thread) {
if (t != trd) {
/*
* Insert the unlinked last element in place of the element we are deleting
*/
t->heap_index = thread->heap_index;
t->heap_index = trd->heap_index;
p = heap_insert(t);
t = *p;
t->left = thread->left;
t->right = thread->right;
t->left = trd->left;
t->right = trd->right;
/*
* Reestablish the heap invariant.
@ -453,26 +453,26 @@ static void heap_delete(_st_thread_t *thread)
}
}
thread->left = thread->right = NULL;
trd->left = trd->right = NULL;
}
void _st_add_sleep_q(_st_thread_t *thread, st_utime_t timeout)
void _st_add_sleep_q(_st_thread_t *trd, st_utime_t timeout)
{
thread->due = _ST_LAST_CLOCK + timeout;
thread->flags |= _ST_FL_ON_SLEEPQ;
thread->heap_index = ++_ST_SLEEPQ_SIZE;
heap_insert(thread);
trd->due = _ST_LAST_CLOCK + timeout;
trd->flags |= _ST_FL_ON_SLEEPQ;
trd->heap_index = ++_ST_SLEEPQ_SIZE;
heap_insert(trd);
}
void _st_del_sleep_q(_st_thread_t *thread)
void _st_del_sleep_q(_st_thread_t *trd)
{
heap_delete(thread);
thread->flags &= ~_ST_FL_ON_SLEEPQ;
heap_delete(trd);
trd->flags &= ~_ST_FL_ON_SLEEPQ;
}
void _st_vp_check_clock(void)
{
_st_thread_t *thread;
_st_thread_t *trd;
st_utime_t elapsed, now;
now = st_utime();
@ -485,50 +485,50 @@ void _st_vp_check_clock(void)
}
while (_ST_SLEEPQ != NULL) {
thread = _ST_SLEEPQ;
ST_ASSERT(thread->flags & _ST_FL_ON_SLEEPQ);
if (thread->due > now) {
trd = _ST_SLEEPQ;
ST_ASSERT(trd->flags & _ST_FL_ON_SLEEPQ);
if (trd->due > now) {
break;
}
_ST_DEL_SLEEPQ(thread);
_ST_DEL_SLEEPQ(trd);
/* If thread is waiting on condition variable, set the time out flag */
if (thread->state == _ST_ST_COND_WAIT) {
thread->flags |= _ST_FL_TIMEDOUT;
if (trd->state == _ST_ST_COND_WAIT) {
trd->flags |= _ST_FL_TIMEDOUT;
}
/* Make thread runnable */
ST_ASSERT(!(thread->flags & _ST_FL_IDLE_THREAD));
thread->state = _ST_ST_RUNNABLE;
_ST_ADD_RUNQ(thread);
ST_ASSERT(!(trd->flags & _ST_FL_IDLE_THREAD));
trd->state = _ST_ST_RUNNABLE;
_ST_ADD_RUNQ(trd);
}
}
void st_thread_interrupt(_st_thread_t *thread)
void st_thread_interrupt(_st_thread_t* trd)
{
/* If thread is already dead */
if (thread->state == _ST_ST_ZOMBIE) {
if (trd->state == _ST_ST_ZOMBIE) {
return;
}
thread->flags |= _ST_FL_INTERRUPT;
trd->flags |= _ST_FL_INTERRUPT;
if (thread->state == _ST_ST_RUNNING || thread->state == _ST_ST_RUNNABLE) {
if (trd->state == _ST_ST_RUNNING || trd->state == _ST_ST_RUNNABLE) {
return;
}
if (thread->flags & _ST_FL_ON_SLEEPQ) {
_ST_DEL_SLEEPQ(thread);
if (trd->flags & _ST_FL_ON_SLEEPQ) {
_ST_DEL_SLEEPQ(trd);
}
/* Make thread runnable */
thread->state = _ST_ST_RUNNABLE;
_ST_ADD_RUNQ(thread);
trd->state = _ST_ST_RUNNABLE;
_ST_ADD_RUNQ(trd);
}
_st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinable, int stk_size)
{
_st_thread_t *thread;
_st_thread_t *trd;
_st_stack_t *stack;
void **ptds;
char *sp;
@ -549,7 +549,7 @@ _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinabl
sp = sp - (ST_KEYS_MAX * sizeof(void *));
ptds = (void **) sp;
sp = sp - sizeof(_st_thread_t);
thread = (_st_thread_t *) sp;
trd = (_st_thread_t *) sp;
/* Make stack 64-byte aligned */
if ((unsigned long)sp & 0x3f) {
@ -560,35 +560,35 @@ _st_thread_t *st_thread_create(void *(*start)(void *arg), void *arg, int joinabl
#error Unknown Stack Grown
#endif
memset(thread, 0, sizeof(_st_thread_t));
memset(trd, 0, sizeof(_st_thread_t));
memset(ptds, 0, ST_KEYS_MAX * sizeof(void *));
/* Initialize thread */
thread->private_data = ptds;
thread->stack = stack;
thread->start = start;
thread->arg = arg;
trd->private_data = ptds;
trd->stack = stack;
trd->start = start;
trd->arg = arg;
_ST_INIT_CONTEXT(thread, stack->sp, _st_thread_main);
_ST_INIT_CONTEXT(trd, stack->sp, _st_thread_main);
/* If thread is joinable, allocate a termination condition variable */
if (joinable) {
thread->term = st_cond_new();
if (thread->term == NULL) {
_st_stack_free(thread->stack);
trd->term = st_cond_new();
if (trd->term == NULL) {
_st_stack_free(trd->stack);
return NULL;
}
}
/* Make thread runnable */
thread->state = _ST_ST_RUNNABLE;
trd->state = _ST_ST_RUNNABLE;
_st_active_count++;
_ST_ADD_RUNQ(thread);
_ST_ADD_RUNQ(trd);
#ifdef DEBUG
_ST_ADD_THREADQ(thread);
_ST_ADD_THREADQ(trd);
#endif
return thread;
return trd;
}
_st_thread_t *st_thread_self(void)
@ -598,7 +598,7 @@ _st_thread_t *st_thread_self(void)
#ifdef DEBUG
/* ARGSUSED */
void _st_show_thread_stack(_st_thread_t *thread, const char *messg)
void _st_show_thread_stack(_st_thread_t *trd, const char *messg)
{
}
@ -607,43 +607,43 @@ int _st_iterate_threads_flag = 0;
void _st_iterate_threads(void)
{
static _st_thread_t *thread = NULL;
static _st_thread_t *trd = NULL;
static jmp_buf orig_jb, save_jb;
_st_clist_t *q;
if (!_st_iterate_threads_flag) {
if (thread) {
memcpy(thread->context, save_jb, sizeof(jmp_buf));
if (trd) {
memcpy(trd->context, save_jb, sizeof(jmp_buf));
MD_LONGJMP(orig_jb, 1);
}
return;
}
if (thread) {
memcpy(thread->context, save_jb, sizeof(jmp_buf));
_st_show_thread_stack(thread, NULL);
if (trd) {
memcpy(trd->context, save_jb, sizeof(jmp_buf));
_st_show_thread_stack(trd, NULL);
} else {
if (MD_SETJMP(orig_jb)) {
_st_iterate_threads_flag = 0;
thread = NULL;
_st_show_thread_stack(thread, "Iteration completed");
trd = NULL;
_st_show_thread_stack(trd, "Iteration completed");
return;
}
thread = _ST_CURRENT_THREAD();
_st_show_thread_stack(thread, "Iteration started");
trd = _ST_CURRENT_THREAD();
_st_show_thread_stack(trd, "Iteration started");
}
q = thread->tlink.next;
q = trd->tlink.next;
if (q == &_ST_THREADQ) {
q = q->next;
}
ST_ASSERT(q != &_ST_THREADQ);
thread = _ST_THREAD_THREADQ_PTR(q);
if (thread == _ST_CURRENT_THREAD()) {
trd = _ST_THREAD_THREADQ_PTR(q);
if (trd == _ST_CURRENT_THREAD()) {
MD_LONGJMP(orig_jb, 1);
}
memcpy(save_jb, thread->context, sizeof(jmp_buf));
MD_LONGJMP(thread->context, 1);
memcpy(save_jb, trd->context, sizeof(jmp_buf));
MD_LONGJMP(trd->context, 1);
}
#endif /* DEBUG */

75
trunk/research/st/srs.c
View file

@ -1,4 +1,5 @@
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
@ -14,6 +15,64 @@
#define srs_trace(msg, ...) printf(msg, ##__VA_ARGS__);printf("\n")
int io_port = 1990;
int sleep_ms = 100;
void stack_print(long int previous_sp, int level)
{
if (level <= 0) {
return;
}
register long int rsp asm("sp");
char buf[level * 1024];
stack_print(rsp, level - 1);
srs_trace("%d. psp=%#lx, sp=%#lx, size=%dB(%dB+%dKB)",
level, previous_sp, rsp, (int)(previous_sp - rsp),
(int)(previous_sp - rsp - sizeof(buf)), (int)(sizeof(buf) / 1024));
}
int huge_stack_test()
{
srs_trace("===================================================");
srs_trace("huge_stack test: start");
register long int rsp asm("sp");
stack_print(rsp, 10);
srs_trace("huge_stack test: end");
return 0;
}
void* thread_func(void* arg)
{
srs_trace("1. thread run");
st_usleep(sleep_ms * 1000);
srs_trace("2. thread completed");
return NULL;
}
int thread_test()
{
srs_trace("===================================================");
srs_trace("thread test: start");
st_thread_t trd = st_thread_create(thread_func, NULL, 1, 0);
if (trd == NULL) {
srs_trace("st_thread_create failed");
return -1;
}
st_thread_join(trd, NULL);
srs_trace("3. thread joined");
srs_trace("thread test: end");
exit(0);
return 0;
}
st_mutex_t sync_start = NULL;
st_cond_t sync_cond = NULL;
@ -26,14 +85,14 @@ void* sync_master(void* arg)
st_mutex_lock(sync_start);
st_mutex_unlock(sync_start);
st_usleep(100 * 1000);
st_usleep(sleep_ms * 1000);
st_cond_signal(sync_cond);
st_mutex_lock(sync_mutex);
srs_trace("2. st mutex is ok");
st_mutex_unlock(sync_mutex);
st_usleep(100 * 1000);
st_usleep(sleep_ms * 1000);
srs_trace("3. st thread is ok");
st_cond_signal(sync_cond);
@ -54,7 +113,7 @@ void* sync_slave(void* arg)
srs_trace("1. st cond is ok");
// release mutex to control thread
st_usleep(100 * 1000);
st_usleep(sleep_ms * 1000);
st_mutex_unlock(sync_mutex);
// wait thread to exit.
@ -278,6 +337,16 @@ int main(int argc, char** argv)
return -1;
}
if (huge_stack_test() < 0) {
srs_trace("huge_stack_test failed");
return -1;
}
if (thread_test() < 0) {
srs_trace("thread_test failed");
return -1;
}
if (sync_test() < 0) {
srs_trace("sync_test failed");
return -1;