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Fix high CPU usage when game paused #32

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Fix high CPU usage when game paused #32

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6 changes: 4 additions & 2 deletions user/xo-user.c
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Original file line number Diff line number Diff line change
Expand Up @@ -99,12 +99,14 @@ static void task_io(int argc, void *argv[])
int max_fd = *(int *) argv[3];
struct xo_table xo_tlb;
fd_set readset;
int wait_fd = read_attr ? max_fd : STDIN_FILENO;

FD_ZERO(&readset);
FD_SET(STDIN_FILENO, &readset);
FD_SET(device_fd, &readset);
if (read_attr)
FD_SET(device_fd, &readset);

int result = select(max_fd + 1, &readset, NULL, NULL, NULL);
int result = select(wait_fd + 1, &readset, NULL, NULL, NULL);
if (result < 0) {
printf("Error with select system call\n");
exit(1);
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