Use generic lock-free queue for async threads

Queues used for communication between async threads and scheduler threads
have been replaced with lock-free queues.

Drivers using the driver_async functionality are not automatically locked
to the system anymore, and can be unloaded as any dynamically linked in
driver.

Scheduling of ready async jobs is now also interleaved in between other
jobs. Previously all ready async jobs was performed at once.

1 files changed, 2 insertions, 9 deletions

diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index b63fe98f27..f9cbcc5892 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -475,15 +475,6 @@ __decl_noreturn void __noreturn erl_exit(int n, char*, ...);
 #define ERTS_ABORT_EXIT	(INT_MIN + 1)	/* no crash dump; only abort() */
 #define ERTS_DUMP_EXIT	(127)		/* crash dump; then exit() */
 
-
-#ifndef ERTS_SMP
-int check_async_ready(void);
-#ifdef USE_THREADS
-void sys_async_ready(int hndl);
-int erts_register_async_ready_callback(void (*funcp)(void));
-#endif
-#endif
-
 Eterm erts_check_io_info(void *p);
 
 /* Size of misc memory allocated from system dependent code */
@@ -671,6 +662,8 @@ int erts_sys_putenv(char *key_value, int sep_ix);
    *size), a value > 0 if value buffer is too small (*size is set to needed
    size), and a value < 0 on failure. */
 int erts_sys_getenv(char *key, char *value, size_t *size);
+/* erts_sys_getenv__() is only allowed to be used in early init phase */
+int erts_sys_getenv__(char *key, char *value, size_t *size);
 
 /* Easier to use, but not as efficient, environment functions */
 char *erts_read_env(char *key);