37 lines
970 B
C
37 lines
970 B
C
#include <libguile.h>
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#include "seat.h"
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#include "call-idle-handler.h"
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static void *call_idle_handler_inner (void *data)
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{
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struct Call_idle_handler_parameters *params =
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(struct Call_idle_handler_parameters *)data;
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SCM event = { 0 };
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switch (params->event)
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{
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case IDLE: event = scm_from_utf8_symbol("idle"); break;
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case RESUME: event = scm_from_utf8_symbol("resume"); break;
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}
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return scm_call_1(params->idle->handler, event);
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}
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void *call_idle_handler (void *data)
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{
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/* Continuation barrier causes stack unwind on exceptions (i.e. errors
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* in the user defined idle handler) to stop here. Otherwise the entire
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* stack created by scm_with_guile() would be unwound. This makes
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* responding to exceptions nicer.
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*/
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SCM call_result = scm_c_with_continuation_barrier(
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call_idle_handler_inner, data
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);
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if ( call_result == NULL )
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return (void *)"ERROR: An exception occured while calling the idle handler.\n";
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return NULL;
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}
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