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Allow mux to specify the default value

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Will be written to the output when the selection function returns NULL
as the selected input.
This commit is contained in:
Rodrigo Arias 2023-03-08 16:53:38 +01:00 committed by Rodrigo Arias Mallo
parent 920866d8af
commit c624374cc8
2 changed files with 14 additions and 2 deletions
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13
src/emu/mux.c
View File

@ -97,13 +97,15 @@ cb_select(struct chan *sel_chan, void *ptr)
value_str(sel_value), input->chan->name); value_str(sel_value), input->chan->name);
} }
/* Set to null by default */ struct value out_value = mux->def;
struct value out_value = value_null();
if (input != NULL && chan_read(input->chan, &out_value) != 0) { if (input != NULL && chan_read(input->chan, &out_value) != 0) {
err("chan_read() failed"); err("chan_read() failed");
return -1; return -1;
} }
dbg("setting output chan %s to %s",
mux->output->name, value_str(out_value, buf));
if (chan_set(mux->output, out_value) != 0) { if (chan_set(mux->output, out_value) != 0) {
err("chan_set() failed"); err("chan_set() failed");
return -1; return -1;
@ -180,6 +182,7 @@ mux_init(struct mux *mux,
mux->output = output; mux->output = output;
mux->ninputs = ninputs; mux->ninputs = ninputs;
mux->inputs = calloc(ninputs, sizeof(struct mux_input)); mux->inputs = calloc(ninputs, sizeof(struct mux_input));
mux->def = value_null();
if (mux->inputs == NULL) { if (mux->inputs == NULL) {
err("calloc failed:"); err("calloc failed:");
@ -245,3 +248,9 @@ mux_set_input(struct mux *mux, int64_t index, struct chan *chan)
return 0; return 0;
} }
void
mux_set_default(struct mux *mux, struct value def)
{
mux->def = def;
}

3
src/emu/mux.h
View File

@ -31,6 +31,7 @@ struct mux {
mux_select_func_t select_func; mux_select_func_t select_func;
struct chan *select; struct chan *select;
struct chan *output; struct chan *output;
struct value def;
}; };
void mux_input_init(struct mux_input *mux, void mux_input_init(struct mux_input *mux,
@ -54,4 +55,6 @@ USE_RET struct mux_input *mux_get_input(struct mux *mux,
USE_RET int mux_register(struct mux *mux, USE_RET int mux_register(struct mux *mux,
struct bay *bay); struct bay *bay);
void mux_set_default(struct mux *mux, struct value def);
#endif /* MUX_H */ #endif /* MUX_H */