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Move thread creation into cor_platform
jonroach
on 8:04 AM Oct 21 2025
trunk/coroutine/asleep.c
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#include "asleep.h"
#include "task.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <string.h>
#include "cor_platform.h"
typedef struct Loop_Timer {
int64_t when;
Future *who;
} Loop_Timer;
typedef struct _ASleep {
_Cor_Mutex mutex;
unsigned users;
Loop_Timer *sleepers;
int lo;
int hi;
int max;
_Cor_Semaphore sem;
bool sleeploop_cancel;
pthread_t sleeploop;
bool started;
} _ASleep;
static _ASleep asleep;
static void *ASleep_Sleeper(void *param);
static void ASleep_ctor(
_ASleep *me
){
int r;
me->sleepers = NULL;
me->lo = 0;
me->hi = 0;
me->max = 0;
_Cor_Mutex_ctor(&me->mutex);
_Cor_Semaphore_ctor(&me->sem);
me->sleeploop_cancel = false;
r = pthread_create(&me->sleeploop, NULL, ASleep_Sleeper, me);
assert(r == 0);
me->started = true;
}
static void ASleep_dtor(
_ASleep *me
){
int r;
me->started = false;
me->sleeploop_cancel = true;
_Cor_Semaphore_Signal(&me->sem);
r = pthread_join(me->sleeploop, NULL);
assert(r == 0);
_Cor_Sempahore_dtor(&me->sem);
_Cor_Mutex_dtor(&me->mutex);
free(me->sleepers);
}
void ASleep_StartSystem(){
ASleep_ctor(&asleep);
}
void ASleep_StopSystem(){
ASleep_dtor(&asleep);
}
static void ASleep_AddSleeper(
_ASleep *me,
int64_t when,
Future *who
){
_Cor_Mutex_Lock(&me->mutex);
int nsleepers;
if (me->lo <= me->hi){
int nsleepers = me->hi - me->lo;
// ensure there's always an empty slot so that lo == hi always means no sleepers
if (nsleepers+1 >= me->max) {
me->max = (me->max == 0) ? 4 : me->max * 2;
me->sleepers = realloc(me->sleepers, me->max * sizeof(Loop_Timer));
assert(me->sleepers);
}
} else {
nsleepers = me->hi + me->max - me->lo;
// ensure there's always an empty slot so that lo == hi always means no sleepers
if (nsleepers+1 >= me->max) {
int oldmax = me->max;
me->max = (me->max == 0) ? 4 : me->max * 2;
me->sleepers = realloc(me->sleepers, me->max * sizeof(Loop_Timer));
assert(me->sleepers);
memmove(&me->sleepers[me->lo], &me->lo + me->max - oldmax, sizeof(*me->sleepers) * oldmax - me->lo);
me->lo += me->max - oldmax;
}
}
// insertion sort - we're assuming there's not going to be many sleepers active at once
int i;
int nexti;
for (i = me->hi; i != me->lo; i = nexti){
nexti = i-1;
if (i < 0){
nexti += me->max;
}
if (me->sleepers[nexti].when <= when){
break;
}
me->sleepers[i] = me->sleepers[nexti];
}
me->sleepers[i].when = when;
me->sleepers[i].who = who;
me->hi += 1;
if (me->hi >= me->max){
me->hi -= me->max;
}
_Cor_Mutex_Unlock(&me->mutex);
_Cor_Semaphore_Signal(&me->sem);
}
static void ASleep_RemoveSleeper(
_ASleep *me,
int64_t when,
Future *who
){
_Cor_Mutex_Lock(&me->mutex);
int i;
for (i = me->lo; i != me->hi; ){
if (me->sleepers[i].when == when && me->sleepers[i].who == who){
int previ = i;
i += 1;
if (i >= me->max){
i -= me->max;
}
for (; i != me->hi; ){
me->sleepers[previ] = me->sleepers[i];
previ = i;
i += 1;
if (i >= me->max){
i -= me->max;
}
}
me->hi = previ;
break;
}
i += 1;
if (i >= me->max){
i -= me->max;
}
}
_Cor_Mutex_Unlock(&me->mutex);
_Cor_Semaphore_Signal(&me->sem);
}
static void *ASleep_Sleeper(
void *param
){
_ASleep *me = (_ASleep *)param;
while (!me->sleeploop_cancel){
_Cor_Mutex_Lock(&me->mutex);
bool got_one;
if (me->lo != me->hi){
int64_t when = me->sleepers[0].when;
_Cor_Mutex_Unlock(&me->mutex);
got_one = _Cor_Semaphore_Wait(&me->sem, when);
} else {
_Cor_Mutex_Unlock(&me->mutex);
got_one = _Cor_Semaphore_Wait(&me->sem, -1);
}
if (!got_one){
// timed out, so...
// issue any due timers
int64_t now = _Cor_Realtime_Now();
while(me->lo != me->hi && me->sleepers[me->lo].when <= now) {
Future *fut = me->sleepers[me->lo].who;
me->lo += 1;
if (me->lo >= me->max){
me->lo -= me->max;
}
_Cor_Mutex_Unlock(&me->mutex);
Future_SetResult(fut, false, NULL);
_Cor_Mutex_Lock(&me->mutex);
now = _Cor_Realtime_Now();
}
_Cor_Mutex_Unlock(&me->mutex);
}
}
return NULL;
}
// value is a pointer to a float delay in seconds
bool ASleep(
float delay,
void **value
){
assert(current_task && asleep.started);
if (delay < 0){
delay = 0;
}
int64_t endtime = _Cor_Realtime_Now() + (int64_t)(delay * 1000000000);
Future fut;
Future_ctor(&fut);
ASleep_AddSleeper(&asleep, endtime, &fut);
bool res = Future_Await(&fut, value);
ASleep_RemoveSleeper(&asleep, endtime, &fut);
Future_dtor(&fut);
return res;
}
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#include "asleep.h"
#include "task.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <math.h>
#include <string.h>
#include "cor_platform.h"
typedef struct Loop_Timer {
int64_t when;
Future *who;
} Loop_Timer;
typedef struct _ASleep {
_Cor_Mutex mutex;
unsigned users;
Loop_Timer *sleepers;
int lo;
int hi;
int max;
_Cor_Semaphore sem;
bool sleeploop_cancel;
_Cor_Thread sleeploop;
bool started;
} _ASleep;
static _ASleep asleep;
static void *ASleep_Sleeper(void *param);
static void ASleep_ctor(
_ASleep *me
){
me->sleepers = NULL;
me->lo = 0;
me->hi = 0;
me->max = 0;
_Cor_Mutex_ctor(&me->mutex);
_Cor_Semaphore_ctor(&me->sem);
me->sleeploop_cancel = false;
_Cor_Thread_ctor(&me->sleeploop, ASleep_Sleeper, me);
me->started = true;
}
static void ASleep_dtor(
_ASleep *me
){
me->started = false;
me->sleeploop_cancel = true;
_Cor_Semaphore_Signal(&me->sem);
_Cor_Thread_Join(&me->sleeploop);
_Cor_Thread_dtor(&me->sleeploop);
_Cor_Sempahore_dtor(&me->sem);
_Cor_Mutex_dtor(&me->mutex);
free(me->sleepers);
}
void ASleep_StartSystem(){
ASleep_ctor(&asleep);
}
void ASleep_StopSystem(){
ASleep_dtor(&asleep);
}
static void ASleep_AddSleeper(
_ASleep *me,
int64_t when,
Future *who
){
_Cor_Mutex_Lock(&me->mutex);
int nsleepers;
if (me->lo <= me->hi){
int nsleepers = me->hi - me->lo;
// ensure there's always an empty slot so that lo == hi always means no sleepers
if (nsleepers+1 >= me->max) {
me->max = (me->max == 0) ? 4 : me->max * 2;
me->sleepers = realloc(me->sleepers, me->max * sizeof(Loop_Timer));
assert(me->sleepers);
}
} else {
nsleepers = me->hi + me->max - me->lo;
// ensure there's always an empty slot so that lo == hi always means no sleepers
if (nsleepers+1 >= me->max) {
int oldmax = me->max;
me->max = (me->max == 0) ? 4 : me->max * 2;
me->sleepers = realloc(me->sleepers, me->max * sizeof(Loop_Timer));
assert(me->sleepers);
memmove(&me->sleepers[me->lo], &me->lo + me->max - oldmax, sizeof(*me->sleepers) * oldmax - me->lo);
me->lo += me->max - oldmax;
}
}
// insertion sort - we're assuming there's not going to be many sleepers active at once
int i;
int nexti;
for (i = me->hi; i != me->lo; i = nexti){
nexti = i-1;
if (i < 0){
nexti += me->max;
}
if (me->sleepers[nexti].when <= when){
break;
}
me->sleepers[i] = me->sleepers[nexti];
}
me->sleepers[i].when = when;
me->sleepers[i].who = who;
me->hi += 1;
if (me->hi >= me->max){
me->hi -= me->max;
}
_Cor_Mutex_Unlock(&me->mutex);
_Cor_Semaphore_Signal(&me->sem);
}
static void ASleep_RemoveSleeper(
_ASleep *me,
int64_t when,
Future *who
){
_Cor_Mutex_Lock(&me->mutex);
int i;
for (i = me->lo; i != me->hi; ){
if (me->sleepers[i].when == when && me->sleepers[i].who == who){
int previ = i;
i += 1;
if (i >= me->max){
i -= me->max;
}
for (; i != me->hi; ){
me->sleepers[previ] = me->sleepers[i];
previ = i;
i += 1;
if (i >= me->max){
i -= me->max;
}
}
me->hi = previ;
break;
}
i += 1;
if (i >= me->max){
i -= me->max;
}
}
_Cor_Mutex_Unlock(&me->mutex);
_Cor_Semaphore_Signal(&me->sem);
}
static void *ASleep_Sleeper(
void *param
){
_ASleep *me = (_ASleep *)param;
while (!me->sleeploop_cancel){
_Cor_Mutex_Lock(&me->mutex);
bool got_one;
if (me->lo != me->hi){
int64_t when = me->sleepers[0].when;
_Cor_Mutex_Unlock(&me->mutex);
got_one = _Cor_Semaphore_Wait(&me->sem, when);
} else {
_Cor_Mutex_Unlock(&me->mutex);
got_one = _Cor_Semaphore_Wait(&me->sem, -1);
}
if (!got_one){
// timed out, so...
// issue any due timers
int64_t now = _Cor_Realtime_Now();
while(me->lo != me->hi && me->sleepers[me->lo].when <= now) {
Future *fut = me->sleepers[me->lo].who;
me->lo += 1;
if (me->lo >= me->max){
me->lo -= me->max;
}
_Cor_Mutex_Unlock(&me->mutex);
Future_SetResult(fut, false, NULL);
_Cor_Mutex_Lock(&me->mutex);
now = _Cor_Realtime_Now();
}
_Cor_Mutex_Unlock(&me->mutex);
}
}
return NULL;
}
// value is a pointer to a float delay in seconds
bool ASleep(
float delay,
void **value
){
assert(current_task && asleep.started);
if (delay < 0){
delay = 0;
}
int64_t endtime = _Cor_Realtime_Now() + (int64_t)(delay * 1000000000);
Future fut;
Future_ctor(&fut);
ASleep_AddSleeper(&asleep, endtime, &fut);
bool res = Future_Await(&fut, value);
ASleep_RemoveSleeper(&asleep, endtime, &fut);
Future_dtor(&fut);
return res;
}
trunk/coroutine/cor_platform.c
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#include "cor_platform.h"
#include <assert.h>
#include "timespec_utils.h"
void _Cor_Mutex_ctor(_Cor_Mutex *mut){
int r;
r = pthread_mutex_init(&mut->mut, NULL);
assert(r == 0);
}
void _Cor_Mutex_dtor(_Cor_Mutex *mut){
int r;
r = pthread_mutex_destroy(&mut->mut);
assert(r == 0);
}
void _Cor_Mutex_Lock(_Cor_Mutex *mut){
int r;
r = pthread_mutex_lock(&mut->mut);
assert(r == 0);
}
void _Cor_Mutex_Unlock(_Cor_Mutex *mut){
int r;
r = pthread_mutex_unlock(&mut->mut);
assert(r == 0);
}
int64_t _Cor_Realtime_Now(){
int r;
struct timespec now;
r = clock_gettime(CLOCK_REALTIME, &now);
assert(r == 0);
return int64_ns_from_timespec(now);
}
void _Cor_Semaphore_ctor(_Cor_Semaphore *sem){
int r;
r = pthread_mutex_init(&sem->mut, NULL);
assert(r == 0);
r = pthread_cond_init(&sem->cond, NULL);
assert(r == 0);
sem->count = 0;
}
void _Cor_Sempahore_dtor(_Cor_Semaphore *sem){
int r;
r = pthread_cond_destroy(&sem->cond);
assert(r == 0);
r = pthread_mutex_destroy(&sem->mut);
assert(r == 0);
}
// timeout_when < 0 means 'wait forever'
// Returns true for success, false for timeout
bool _Cor_Semaphore_Wait(_Cor_Semaphore *sem, int64_t timeout_when){
int r;
r = pthread_mutex_lock(&sem->mut);
assert(r == 0);
if (sem->count == 0) {
if (timeout_when >= 0) {
struct timespec ts = timespec_from_int64_ns(timeout_when);
r = pthread_cond_timedwait(&sem->cond, &sem->mut, &ts);
}
else {
r = pthread_cond_wait(&sem->cond, &sem->mut);
}
}
assert(r == 0 || r == ETIMEDOUT);
bool res;
if (sem->count > 0) {
sem->count--;
res = true;
} else {
res = false;
}
r = pthread_mutex_unlock(&sem->mut);
assert(r == 0);
return res;
}
void _Cor_Semaphore_Signal(_Cor_Semaphore *sem){
int r;
r = pthread_mutex_lock(&sem->mut);
assert(r == 0);
sem->count++;
r = pthread_cond_signal(&sem->cond);
assert(r == 0);
r = pthread_mutex_unlock(&sem->mut);
assert(r == 0);
}
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#include "cor_platform.h"
#include <assert.h>
#include "timespec_utils.h"
#include <stdio.h>
void _Cor_Mutex_ctor(_Cor_Mutex *mut){
int r;
r = pthread_mutex_init(&mut->mut, NULL);
assert(r == 0);
}
void _Cor_Mutex_dtor(_Cor_Mutex *mut){
int r;
r = pthread_mutex_destroy(&mut->mut);
assert(r == 0);
}
void _Cor_Mutex_Lock(_Cor_Mutex *mut){
int r;
r = pthread_mutex_lock(&mut->mut);
assert(r == 0);
}
void _Cor_Mutex_Unlock(_Cor_Mutex *mut){
int r;
r = pthread_mutex_unlock(&mut->mut);
assert(r == 0);
}
int64_t _Cor_Realtime_Now(){
int r;
struct timespec now;
r = clock_gettime(CLOCK_REALTIME, &now);
assert(r == 0);
return int64_ns_from_timespec(now);
}
void _Cor_Semaphore_ctor(_Cor_Semaphore *sem){
int r;
r = pthread_mutex_init(&sem->mut, NULL);
assert(r == 0);
r = pthread_cond_init(&sem->cond, NULL);
assert(r == 0);
sem->count = 0;
}
void _Cor_Sempahore_dtor(_Cor_Semaphore *sem){
int r;
r = pthread_cond_destroy(&sem->cond);
assert(r == 0);
r = pthread_mutex_destroy(&sem->mut);
assert(r == 0);
}
// timeout_when < 0 means 'wait forever'
// Returns true for success, false for timeout
bool _Cor_Semaphore_Wait(_Cor_Semaphore *sem, int64_t timeout_when){
int r;
r = pthread_mutex_lock(&sem->mut);
assert(r == 0);
if (sem->count == 0) {
if (timeout_when >= 0) {
struct timespec ts = timespec_from_int64_ns(timeout_when);
r = pthread_cond_timedwait(&sem->cond, &sem->mut, &ts);
}
else {
r = pthread_cond_wait(&sem->cond, &sem->mut);
}
}
assert(r == 0 || r == ETIMEDOUT);
bool res;
if (sem->count > 0) {
sem->count--;
res = true;
} else {
res = false;
}
r = pthread_mutex_unlock(&sem->mut);
assert(r == 0);
return res;
}
void _Cor_Semaphore_Signal(_Cor_Semaphore *sem){
int r;
r = pthread_mutex_lock(&sem->mut);
assert(r == 0);
sem->count++;
r = pthread_cond_signal(&sem->cond);
assert(r == 0);
r = pthread_mutex_unlock(&sem->mut);
assert(r == 0);
}
void _Cor_Thread_ctor(_Cor_Thread *th, void *(*fn)(void *), void *param){
int r;
th->joined = false;
r = pthread_create(&th->th, NULL, fn, param);
assert(r == 0);
}
void _Cor_Thread_dtor(_Cor_Thread *th){
int r;
if (!th->joined){
r = pthread_detach(th->th);
assert(r == 0);
}
}
void *_Cor_Thread_Join(_Cor_Thread *th){
int r;
void *res;
r = pthread_join(th->th, &res);
assert(r == 0);
th->joined = true;
return res;
}
trunk/include/cor_platform.h
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#ifndef COR_PLATFORM_H
#define COR_PLATFORM_H
// platform specific parts collected together
#include <stdbool.h>
#include <pthread.h>
#include <errno.h>
// inspired by CPython to achieve platform indenpendence for thread local variables
#ifdef thread_local
#define _Cor_thread_local thread_local
#elif __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
#define _Cor_thread_local _Thread_local
#elif defined(_MSC_VER) /* AKA NT_THREADS */
#define _Cor_thread_local __declspec(thread)
#elif defined(__GNUC__) /* includes clang */
#define _Cor_thread_local __thread
#else
#define _Cor_thread_local
#endif
// Non-reentrant Mutexes
typedef struct _Cor_Mutex {
pthread_mutex_t mut;
} _Cor_Mutex;
void _Cor_Mutex_ctor(_Cor_Mutex *);
void _Cor_Mutex_dtor(_Cor_Mutex *);
void _Cor_Mutex_Lock(_Cor_Mutex *);
void _Cor_Mutex_Unlock(_Cor_Mutex *);
// The 'now' to use for _Cor_Semaphore_Wait, in ns.
int64_t _Cor_Realtime_Now();
typedef struct _Cor_Semaphore {
pthread_mutex_t mut;
pthread_cond_t cond;
unsigned count;
} _Cor_Semaphore;
void _Cor_Semaphore_ctor(_Cor_Semaphore *sem);
void _Cor_Sempahore_dtor(_Cor_Semaphore *sem);
// timeout_when < 0 means 'wait forever'
// Returns true for success, false for timeout
bool _Cor_Semaphore_Wait(_Cor_Semaphore *sem, int64_t timeout_when);
void _Cor_Semaphore_Signal(_Cor_Semaphore *sem);
#endif
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#ifndef COR_PLATFORM_H
#define COR_PLATFORM_H
// platform specific parts collected together
#include <stdbool.h>
#include <pthread.h>
#include <errno.h>
// inspired by CPython to achieve platform indenpendence for thread local variables
#ifdef thread_local
#define _Cor_thread_local thread_local
#elif __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
#define _Cor_thread_local _Thread_local
#elif defined(_MSC_VER) /* AKA NT_THREADS */
#define _Cor_thread_local __declspec(thread)
#elif defined(__GNUC__) /* includes clang */
#define _Cor_thread_local __thread
#else
#define _Cor_thread_local
#endif
// Non-reentrant Mutexes
typedef struct _Cor_Mutex {
pthread_mutex_t mut;
} _Cor_Mutex;
void _Cor_Mutex_ctor(_Cor_Mutex *);
void _Cor_Mutex_dtor(_Cor_Mutex *);
void _Cor_Mutex_Lock(_Cor_Mutex *);
void _Cor_Mutex_Unlock(_Cor_Mutex *);
// The 'now' to use for _Cor_Semaphore_Wait, in ns.
int64_t _Cor_Realtime_Now();
typedef struct _Cor_Semaphore {
pthread_mutex_t mut;
pthread_cond_t cond;
unsigned count;
} _Cor_Semaphore;
void _Cor_Semaphore_ctor(_Cor_Semaphore *sem);
void _Cor_Sempahore_dtor(_Cor_Semaphore *sem);
// timeout_when < 0 means 'wait forever'
// Returns true for success, false for timeout
bool _Cor_Semaphore_Wait(_Cor_Semaphore *sem, int64_t timeout_when);
void _Cor_Semaphore_Signal(_Cor_Semaphore *sem);
typedef struct _Cor_Thread {
pthread_t th;
bool joined;
} _Cor_Thread;
void _Cor_Thread_ctor(_Cor_Thread *, void *(*)(void *), void *);
void _Cor_Thread_dtor(_Cor_Thread *);
void *_Cor_Thread_Join(_Cor_Thread *);
#endif