SYS_MBOX_EMPTY macro

sys_mbox_tryfetch() returns SYS_MBOX_EMPTY if appropriate. For now we use the same magic value, but we allow this to change in future.

Syntax

#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT

Location	Text
sys.h:92	#define SYS_MBOX_EMPTY SYS_ARCH_TIMEOUT
api_msg.c:839	while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
api_msg.c:864	while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
sys_arch.c:231	return SYS_MBOX_EMPTY;