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removing static globals so multiple unrelated contexts can use threads

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This commit is contained in:
Alex Shinn 2011-11-04 15:19:28 +09:00
parent 395d5be5ad
commit 68a95bc366
2 changed files with 17 additions and 18 deletions
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2
include/chibi/sexp.h
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@ -1059,6 +1059,8 @@ enum sexp_context_globals {
SEXP_G_THREADS_POLL_FDS,
SEXP_G_THREADS_FD_THREADS,
SEXP_G_THREADS_BLOCKER,
SEXP_G_THREADS_MUTEX_ID,
SEXP_G_THREADS_POLLFDS_ID,
#endif
SEXP_G_NUM_GLOBALS
};

33
lib/srfi/18/threads.c
View file

@ -1,5 +1,5 @@
/* threads.c -- SRFI-18 thread primitives */
/* Copyright (c) 2010 Alex Shinn. All rights reserved. */
/* Copyright (c) 2010-2011 Alex Shinn. All rights reserved. */
/* BSD-style license: http://synthcode.com/license.txt */
#include <chibi/eval.h>
@ -8,13 +8,12 @@
#include <unistd.h>
#include <poll.h>
#define sexp_mutexp(x) (sexp_check_tag(x, sexp_mutex_id))
#define sexp_mutexp(ctx, x) (sexp_check_tag(x, sexp_unbox_fixnum(sexp_global(ctx, SEXP_G_THREADS_MUTEX_ID))))
#define sexp_mutex_name(x) sexp_slot_ref(x, 0)
#define sexp_mutex_specific(x) sexp_slot_ref(x, 1)
#define sexp_mutex_thread(x) sexp_slot_ref(x, 2)
#define sexp_mutex_lockp(x) sexp_slot_ref(x, 3)
#define sexp_condvarp(x) (sexp_check_tag(x, sexp_condvar_id))
#define sexp_condvar_name(x) sexp_slot_ref(x, 0)
#define sexp_condvar_specific(x) sexp_slot_ref(x, 1)
#define sexp_condvar_threads(x) sexp_slot_ref(x, 2)
@ -26,7 +25,7 @@ struct sexp_pollfds_t {
#define SEXP_INIT_POLLFDS_MAX_FDS 16
#define sexp_pollfdsp(x) (sexp_check_tag(x, sexp_pollfds_id))
#define sexp_pollfdsp(ctx, x) (sexp_check_tag(x, sexp_unbox_fixnum(sexp_global(ctx, SEXP_G_THREADS_POLLFDS_ID))))
#define sexp_pollfds_fds(x) (((struct sexp_pollfds_t*)(&(x)->value))->fds)
#define sexp_pollfds_num_fds(x) (((struct sexp_pollfds_t*)(&(x)->value))->nfds)
#define sexp_pollfds_max_fds(x) (((struct sexp_pollfds_t*)(&(x)->value))->mfds)
@ -36,8 +35,6 @@ struct sexp_pollfds_t {
#define timeval_le(a, b) (((a).tv_sec < (b).tv_sec) || (((a).tv_sec == (b).tv_sec) && ((a).tv_usec < (b).tv_usec)))
#define sexp_context_before(c, t) (((sexp_context_timeval(c).tv_sec != 0) || (sexp_context_timeval(c).tv_usec != 0)) && timeval_le(sexp_context_timeval(c), t))
static int sexp_mutex_id, sexp_condvar_id, sexp_pollfds_id;
/**************************** threads *************************************/
static void sexp_define_type_predicate_by_tag (sexp ctx, sexp env, char *cname, sexp_uint_t type) {
@ -184,7 +181,8 @@ sexp sexp_thread_sleep (sexp ctx sexp_api_params(self, n), sexp timeout) {
/**************************** mutexes *************************************/
sexp sexp_mutex_state (sexp ctx sexp_api_params(self, n), sexp mutex) {
sexp_assert_type(ctx, sexp_mutexp, sexp_mutex_id, mutex);
if (!sexp_mutexp(ctx, mutex))
return sexp_type_exception(ctx, self, sexp_unbox_fixnum(sexp_global(ctx, SEXP_G_THREADS_POLLFDS_ID)), mutex);
if (sexp_truep(sexp_mutex_lockp(mutex))) {
if (sexp_contextp(sexp_mutex_thread(mutex)))
return sexp_mutex_thread(mutex);
@ -302,7 +300,7 @@ static sexp sexp_get_signal_handler (sexp ctx sexp_api_params(self, n), sexp sig
}
static sexp sexp_make_pollfds (sexp ctx) {
sexp res = sexp_alloc_tagged(ctx, sexp_sizeof_pollfds, sexp_pollfds_id);
sexp res = sexp_alloc_tagged(ctx, sexp_sizeof_pollfds, sexp_unbox_fixnum(sexp_global(ctx, SEXP_G_THREADS_POLLFDS_ID)));
sexp_pollfds_fds(res) = malloc(SEXP_INIT_POLLFDS_MAX_FDS * sizeof(struct pollfd));
sexp_pollfds_num_fds(res) = 0;
sexp_pollfds_max_fds(res) = SEXP_INIT_POLLFDS_MAX_FDS;
@ -324,7 +322,7 @@ static sexp sexp_insert_pollfd (sexp ctx, int fd, int events) {
int i;
struct pollfd *pfd;
sexp pollfds = sexp_global(ctx, SEXP_G_THREADS_POLL_FDS);
if (! (pollfds && sexp_pollfdsp(pollfds))) {
if (! (pollfds && sexp_pollfdsp(ctx, pollfds))) {
sexp_global(ctx, SEXP_G_THREADS_POLL_FDS) = pollfds = sexp_make_pollfds(ctx);
}
for (i=0; i<sexp_pollfds_num_fds(pollfds); ++i) {
@ -394,7 +392,7 @@ sexp sexp_scheduler (sexp ctx sexp_api_params(self, n), sexp root_thread) {
/* check blocked fds */
pollfds = sexp_global(ctx, SEXP_G_THREADS_POLL_FDS);
if (sexp_pollfdsp(pollfds) && sexp_pollfds_num_fds(pollfds) > 0) {
if (sexp_pollfdsp(ctx, pollfds) && sexp_pollfds_num_fds(pollfds) > 0) {
pfds = sexp_pollfds_fds(pollfds);
k = poll(sexp_pollfds_fds(pollfds), sexp_pollfds_num_fds(pollfds), 0);
unblock_io_threads:
@ -529,7 +527,7 @@ sexp sexp_scheduler (sexp ctx sexp_api_params(self, n), sexp root_thread) {
}
/* either wait on an fd, or just sleep */
pollfds = sexp_global(res, SEXP_G_THREADS_POLL_FDS);
if (sexp_portp(sexp_context_event(res)) && sexp_pollfdsp(pollfds)) {
if (sexp_portp(sexp_context_event(res)) && sexp_pollfdsp(ctx, pollfds)) {
if ((k = poll(sexp_pollfds_fds(pollfds), sexp_pollfds_num_fds(pollfds), usecs/1000)) > 0) {
pfds = sexp_pollfds_fds(pollfds);
goto unblock_io_threads;
@ -547,9 +545,9 @@ sexp sexp_scheduler (sexp ctx sexp_api_params(self, n), sexp root_thread) {
/**************************************************************************/
int sexp_lookup_named_type (sexp ctx, sexp env, const char *name) {
sexp sexp_lookup_named_type (sexp ctx, sexp env, const char *name) {
sexp t = sexp_env_ref(env, sexp_intern(ctx, name, -1), SEXP_FALSE);
return (sexp_typep(t)) ? sexp_type_tag(t) : -1;
return sexp_make_fixnum((sexp_typep(t)) ? sexp_type_tag(t) : -1);
}
sexp sexp_init_library (sexp ctx sexp_api_params(self, n), sexp env) {
@ -557,8 +555,7 @@ sexp sexp_init_library (sexp ctx sexp_api_params(self, n), sexp env) {
sexp_gc_var1(name);
sexp_gc_preserve1(ctx, name);
sexp_mutex_id = sexp_lookup_named_type(ctx, env, "Mutex");
sexp_condvar_id = sexp_lookup_named_type(ctx, env, "Condition-Variable");
sexp_global(ctx, SEXP_G_THREADS_MUTEX_ID) = sexp_lookup_named_type(ctx, env, "Mutex");
name = sexp_c_string(ctx, "pollfds", -1);
t = sexp_register_type(ctx, name, SEXP_FALSE, SEXP_FALSE,
SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
@ -566,8 +563,9 @@ sexp sexp_init_library (sexp ctx sexp_api_params(self, n), sexp env) {
SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO, SEXP_ZERO,
SEXP_ZERO, SEXP_ZERO, (sexp_proc2)sexp_free_pollfds,
NULL);
if (sexp_typep(t))
sexp_pollfds_id = sexp_type_tag(t);
if (sexp_typep(t)) {
sexp_global(ctx, SEXP_G_THREADS_POLLFDS_ID) = sexp_make_fixnum(sexp_type_tag(t));
}
sexp_define_type_predicate_by_tag(ctx, env, "thread?", SEXP_CONTEXT);
sexp_define_foreign(ctx, env, "thread-timeout?", 0, sexp_thread_timeoutp);
@ -599,4 +597,3 @@ sexp sexp_init_library (sexp ctx sexp_api_params(self, n), sexp env) {
sexp_gc_release1(ctx);
return SEXP_VOID;
}