diff options
| author | Keith Packard <keithp@keithp.com> | 2010-05-05 00:44:42 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2010-05-05 00:44:42 -0700 |
| commit | f7ff3278bb670df59d7425a014cfe8e3718fea3f (patch) | |
| tree | 435f9e37d36379b4b0fe837e7d0fa0c3b24bd423 /src | |
| parent | aa9ff021d683764a43800eaa18ea0c9be5134939 (diff) | |
Disable interrupts while reading from stdin
With multiple input source support, there is a lag between asking a
device if it has data and then waiting for more data to appear. If an
interrupt signalling additional input arrives in this interval, we'll
go to sleep with input available.
This patch uses a big hammer by just disabling interrupts for the
whole process.
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'src')
| -rw-r--r-- | src/ao_stdio.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/ao_stdio.c b/src/ao_stdio.c index 8add30b8..045dff09 100644 --- a/src/ao_stdio.c +++ b/src/ao_stdio.c @@ -50,6 +50,7 @@ getchar(void) __reentrant char c; int8_t stdio = ao_cur_stdio; + EA = 0; for (;;) { c = stdios[stdio].pollchar(); if (c != AO_READ_AGAIN) @@ -59,6 +60,7 @@ getchar(void) __reentrant if (stdio == ao_cur_stdio) ao_sleep(&ao_stdin_ready); } + EA = 1; ao_cur_stdio = stdio; return c; } |