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Diffstat (limited to 'erts/emulator/sys/unix/sys.c')
-rw-r--r--erts/emulator/sys/unix/sys.c171
1 files changed, 15 insertions, 156 deletions
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index 8e8d4cce61..7f851e6007 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -128,7 +128,6 @@ static ErtsSysReportExit *report_exit_list;
static ErtsSysReportExit *report_exit_transit_list;
#endif
-extern int check_async_ready(void);
extern int driver_interrupt(int, int);
extern void do_break(void);
@@ -1125,31 +1124,6 @@ struct erl_drv_entry vanilla_driver_entry = {
stop_select
};
-#if defined(USE_THREADS) && !defined(ERTS_SMP)
-static int async_drv_init(void);
-static ErlDrvData async_drv_start(ErlDrvPort, char*, SysDriverOpts*);
-static void async_drv_stop(ErlDrvData);
-static void async_drv_input(ErlDrvData, ErlDrvEvent);
-
-/* INTERNAL use only */
-
-struct erl_drv_entry async_driver_entry = {
- async_drv_init,
- async_drv_start,
- async_drv_stop,
- NULL,
- async_drv_input,
- NULL,
- "async",
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL
-};
-#endif
-
/* Handle SIGCHLD signals. */
#if (defined(SIG_SIGSET) || defined(SIG_SIGNAL))
static RETSIGTYPE onchld(void)
@@ -2334,87 +2308,6 @@ static void stop_select(ErlDrvEvent fd, void* _)
close((int)fd);
}
-/*
-** Async opertation support
-*/
-#if defined(USE_THREADS) && !defined(ERTS_SMP)
-static void
-sys_async_ready_failed(int fd, int r, int err)
-{
- char buf[120];
- sprintf(buf, "sys_async_ready(): Fatal error: fd=%d, r=%d, errno=%d\n",
- fd, r, err);
- erts_silence_warn_unused_result(write(2, buf, strlen(buf)));
- abort();
-}
-
-/* called from threads !! */
-void sys_async_ready(int fd)
-{
- int r;
- while (1) {
- r = write(fd, "0", 1); /* signal main thread fd MUST be async_fd[1] */
- if (r == 1) {
- DEBUGF(("sys_async_ready(): r = 1\r\n"));
- break;
- }
- if (r < 0 && errno == EINTR) {
- DEBUGF(("sys_async_ready(): r = %d\r\n", r));
- continue;
- }
- sys_async_ready_failed(fd, r, errno);
- }
-}
-
-static int async_drv_init(void)
-{
- async_fd[0] = -1;
- async_fd[1] = -1;
- return 0;
-}
-
-static ErlDrvData async_drv_start(ErlDrvPort port_num,
- char* name, SysDriverOpts* opts)
-{
- if (async_fd[0] != -1)
- return ERL_DRV_ERROR_GENERAL;
- if (pipe(async_fd) < 0)
- return ERL_DRV_ERROR_GENERAL;
-
- DEBUGF(("async_drv_start: %d\r\n", port_num));
-
- SET_NONBLOCKING(async_fd[0]);
- driver_select(port_num, async_fd[0], ERL_DRV_READ, 1);
-
- if (init_async(async_fd[1]) < 0)
- return ERL_DRV_ERROR_GENERAL;
- return (ErlDrvData)port_num;
-}
-
-static void async_drv_stop(ErlDrvData e)
-{
- int port_num = (int)(long)e;
-
- DEBUGF(("async_drv_stop: %d\r\n", port_num));
-
- exit_async();
-
- driver_select(port_num, async_fd[0], ERL_DRV_READ, 0);
-
- close(async_fd[0]);
- close(async_fd[1]);
- async_fd[0] = async_fd[1] = -1;
-}
-
-
-static void async_drv_input(ErlDrvData e, ErlDrvEvent fd)
-{
- char *buf[32];
- DEBUGF(("async_drv_input\r\n"));
- while (read((int) fd, (void *) buf, 32) > 0); /* fd MUST be async_fd[0] */
- check_async_ready(); /* invoke all async_ready */
-}
-#endif
void erts_do_break_handling(void)
{
@@ -2488,12 +2381,10 @@ erts_sys_putenv(char *buffer, int sep_ix)
}
int
-erts_sys_getenv(char *key, char *value, size_t *size)
+erts_sys_getenv__(char *key, char *value, size_t *size)
{
- char *orig_value;
int res;
- erts_smp_rwmtx_rlock(&environ_rwmtx);
- orig_value = getenv(key);
+ char *orig_value = getenv(key);
if (!orig_value)
res = -1;
else {
@@ -2508,6 +2399,15 @@ erts_sys_getenv(char *key, char *value, size_t *size)
res = 0;
}
}
+ return res;
+}
+
+int
+erts_sys_getenv(char *key, char *value, size_t *size)
+{
+ int res;
+ erts_smp_rwmtx_rlock(&environ_rwmtx);
+ res = erts_sys_getenv__(key, value, size);
erts_smp_rwmtx_runlock(&environ_rwmtx);
return res;
}
@@ -2519,31 +2419,6 @@ sys_init_io(void)
erts_alloc(ERTS_ALC_T_FD_TAB, max_files * sizeof(struct fd_data));
erts_smp_atomic_add_nob(&sys_misc_mem_sz,
max_files * sizeof(struct fd_data));
-
-#ifdef USE_THREADS
-#ifdef ERTS_SMP
- if (init_async(-1) < 0)
- erl_exit(1, "Failed to initialize async-threads\n");
-#else
- {
- /* This is speical stuff, starting a driver from the
- * system routines, but is a nice way of handling stuff
- * the erlang way
- */
- SysDriverOpts dopts;
- int ret;
-
- sys_memset((void*)&dopts, 0, sizeof(SysDriverOpts));
- add_driver_entry(&async_driver_entry);
- ret = erts_open_driver(NULL, NIL, "async", &dopts, NULL);
- DEBUGF(("open_driver = %d\n", ret));
- if (ret < 0)
- erl_exit(1, "Failed to open async driver\n");
- erts_port[ret].status |= ERTS_PORT_SFLG_IMMORTAL;
- }
-#endif
-#endif
-
}
#if (0) /* unused? */
@@ -2770,15 +2645,7 @@ initiate_report_exit_status(ErtsSysReportExit *rep, int status)
rep->next = report_exit_transit_list;
rep->status = status;
report_exit_transit_list = rep;
- /*
- * We need the scheduler thread to call check_children().
- * If the scheduler thread is sleeping in a poll with a
- * timeout, we need to wake the scheduler thread. We use the
- * functionality of the async driver to do this, instead of
- * implementing yet another driver doing the same thing. A
- * little bit ugly, but it works...
- */
- sys_async_ready(async_fd[1]);
+ erts_sys_schedule_interrupt(1);
}
static int check_children(void)
@@ -2865,19 +2732,11 @@ erl_sys_schedule(int runnable)
{
#ifdef ERTS_SMP
ERTS_CHK_IO(!runnable);
- ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking());
#else
- if (runnable) {
- ERTS_CHK_IO(0); /* Poll for I/O */
- check_async_ready(); /* Check async completions */
- } else {
- int wait_for_io = !check_async_ready();
- if (wait_for_io)
- wait_for_io = !check_children();
- ERTS_CHK_IO(wait_for_io);
- }
- (void) check_children();
+ ERTS_CHK_IO(runnable ? 0 : !check_children());
#endif
+ ERTS_SMP_LC_ASSERT(!erts_thr_progress_is_blocking());
+ (void) check_children();
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 14:34:23 +0000