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Fix spurious `throw from within critical section' errors

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The crux of this problem was that the thread doing a throw, and so
checking scm_i_critical_section_level, was different from the thread
that was in a critical section.

* libguile/async.h (scm_i_critical_section_level): Removed, replaced
  by per-thread critical_section_level.
  (SCM_CRITICAL_SECTION_START, SCM_CRITICAL_SECTION_END): Use
  per-thread critical_section_level.

* libguile/continuations.c (scm_dynthrow): Check per-thread
  critical_section_level.

* libguile/threads.c (guilify_self_1): Init per-thread
  critical_section_level.
  (scm_i_critical_section_level): Removed.

* libguile/threads.h (scm_i_thread): New critical_section_level field.

* libguile/throw.c (scm_ithrow): Check per-thread critical_section_level.
This commit is contained in:
Neil Jerram 2009-03-10 23:55:31 +00:00
parent ced1987c77
commit 3009b5d557
5 changed files with 9 additions and 8 deletions
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3
libguile/threads.h
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@ -113,6 +113,9 @@ typedef struct scm_i_thread {
scm_t_contregs *pending_rbs_continuation;
#endif
/* Whether this thread is in a critical section. */
int critical_section_level;
} scm_i_thread;
#define SCM_I_IS_THREAD(x) SCM_SMOB_PREDICATE (scm_tc16_thread, x)