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-rw-r--r--boehm-gc/include/gc.h10
-rw-r--r--boehm-gc/include/private/pthread_support.h1
2 files changed, 11 insertions, 0 deletions
diff --git a/boehm-gc/include/gc.h b/boehm-gc/include/gc.h
index 3507db74dc5..e6ab2c608c4 100644
--- a/boehm-gc/include/gc.h
+++ b/boehm-gc/include/gc.h
@@ -1040,4 +1040,14 @@ GC_API void GC_register_has_static_roots_callback
} /* end of extern "C" */
#endif
+/* External thread suspension support. These functions do not implement
+ * suspension counts or any other higher-level abstraction. Threads which
+ * have been suspended numerous times will resume with the very first call
+ * to GC_resume_thread.
+ */
+#if defined(GC_PTHREADS) && !defined(GC_SOLARIS_THREADS) \
+ && !defined(GC_WIN32_THREADS) && !defined(GC_DARWIN_THREADS)
+GC_API void GC_suspend_thread GC_PROTO((pthread_t));
+GC_API void GC_resume_thread GC_PROTO((pthread_t));
+#endif
#endif /* _GC_H */
diff --git a/boehm-gc/include/private/pthread_support.h b/boehm-gc/include/private/pthread_support.h
index 469021b4071..2186c079039 100644
--- a/boehm-gc/include/private/pthread_support.h
+++ b/boehm-gc/include/private/pthread_support.h
@@ -33,6 +33,7 @@ typedef struct GC_Thread_Rep {
# define FINISHED 1 /* Thread has exited. */
# define DETACHED 2 /* Thread is intended to be detached. */
# define MAIN_THREAD 4 /* True for the original thread only. */
+# define SUSPENDED 8 /* True if thread was suspended externally */
short thread_blocked; /* Protected by GC lock. */
/* Treated as a boolean value. If set, */
/* thread will acquire GC lock before */