Remove a few unused C functions

* src/eval.c (let_shadows_global_binding_p):
* src/print.c (write_string):
* src/systhread.c (sys_mutex_destroy, sys_thread_equal):
Remove.
* src/print.c (write_string): Rename from write_string_1.
All uses changed.

5 files changed, 4 insertions, 70 deletions

diff --git a/src/eval.c b/src/eval.c
index 22b02b49521..9b36ee04ed2 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3213,18 +3213,6 @@ let_shadows_buffer_binding_p (struct Lisp_Symbol *symbol)
   return 0;
 }
 
-bool
-let_shadows_global_binding_p (Lisp_Object symbol)
-{
-  union specbinding *p;
-
-  for (p = specpdl_ptr; p > specpdl; )
-    if ((--p)->kind >= SPECPDL_LET && EQ (specpdl_symbol (p), symbol))
-      return 1;
-
-  return 0;
-}
-
 static void
 do_specbind (struct Lisp_Symbol *sym, union specbinding *bind,
              Lisp_Object value, enum Set_Internal_Bind bindflag)
diff --git a/src/lisp.h b/src/lisp.h
index e048011a860..238c20bc189 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3707,7 +3707,6 @@ extern Lisp_Object Vprin1_to_string_buffer;
 extern void debug_print (Lisp_Object) EXTERNALLY_VISIBLE;
 extern void temp_output_buffer_setup (const char *);
 extern int print_level;
-extern void write_string (const char *);
 extern void print_error_message (Lisp_Object, Lisp_Object, const char *,
                                  Lisp_Object);
 extern Lisp_Object internal_with_output_to_temp_buffer
@@ -3848,7 +3847,6 @@ extern void mark_specpdl (union specbinding *first, union specbinding *ptr);
 extern void get_backtrace (Lisp_Object array);
 Lisp_Object backtrace_top_function (void);
 extern bool let_shadows_buffer_binding_p (struct Lisp_Symbol *symbol);
-extern bool let_shadows_global_binding_p (Lisp_Object symbol);
 
 #ifdef HAVE_MODULES
 /* Defined in alloc.c.  */
diff --git a/src/print.c b/src/print.c
index d8acf838749..85a6c4627e1 100644
--- a/src/print.c
+++ b/src/print.c
@@ -522,23 +522,13 @@ print_c_string (char const *string, Lisp_Object printcharfun)
    Do not use this on the contents of a Lisp string.  */
 
 static void
-write_string_1 (const char *data, Lisp_Object printcharfun)
+write_string (const char *data, Lisp_Object printcharfun)
 {
   PRINTPREPARE;
   print_c_string (data, printcharfun);
   PRINTFINISH;
 }
 
-/* Used from outside of print.c to print a C unibyte
-   string at DATA on the default output stream.
-   Do not use this on the contents of a Lisp string.  */
-
-void
-write_string (const char *data)
-{
-  write_string_1 (data, Vstandard_output);
-}
-
 
 void
 temp_output_buffer_setup (const char *bufname)
@@ -888,7 +878,7 @@ print_error_message (Lisp_Object data, Lisp_Object stream, const char *context,
   Lisp_Object errname, errmsg, file_error, tail;
 
   if (context != 0)
-    write_string_1 (context, stream);
+    write_string (context, stream);
 
   /* If we know from where the error was signaled, show it in
    *Messages*.  */
@@ -934,7 +924,7 @@ print_error_message (Lisp_Object data, Lisp_Object stream, const char *context,
     const char *sep = ": ";
 
     if (!STRINGP (errmsg))
-      write_string_1 ("peculiar error", stream);
+      write_string ("peculiar error", stream);
     else if (SCHARS (errmsg))
       Fprinc (errmsg, stream);
     else
@@ -945,7 +935,7 @@ print_error_message (Lisp_Object data, Lisp_Object stream, const char *context,
         Lisp_Object obj;
 
         if (sep)
-          write_string_1 (sep, stream);
+          write_string (sep, stream);
         obj = XCAR (tail);
         if (!NILP (file_error)
             || EQ (errname, Qend_of_file) || EQ (errname, Quser_error))
diff --git a/src/systhread.c b/src/systhread.c
index a1b3eae64a6..a84060c18f0 100644
--- a/src/systhread.c
+++ b/src/systhread.c
@@ -39,11 +39,6 @@ sys_mutex_unlock (sys_mutex_t *m)
 }
 
 void
-sys_mutex_destroy (sys_mutex_t *m)
-{
-}
-
-void
 sys_cond_init (sys_cond_t *c)
 {
   *c = 0;
@@ -76,12 +71,6 @@ sys_thread_self (void)
 }
 
 int
-sys_thread_equal (sys_thread_t x, sys_thread_t y)
-{
-  return x == y;
-}
-
-int
 sys_thread_create (sys_thread_t *t, const char *name,
                    thread_creation_function *func, void *datum)
 {
@@ -120,12 +109,6 @@ sys_mutex_unlock (sys_mutex_t *mutex)
 }
 
 void
-sys_mutex_destroy (sys_mutex_t *mutex)
-{
-  pthread_mutex_destroy (mutex);
-}
-
-void
 sys_cond_init (sys_cond_t *cond)
 {
   pthread_cond_init (cond, NULL);
@@ -162,12 +145,6 @@ sys_thread_self (void)
 }
 
 int
-sys_thread_equal (sys_thread_t one, sys_thread_t two)
-{
-  return pthread_equal (one, two);
-}
-
-int
 sys_thread_create (sys_thread_t *thread_ptr, const char *name,
                    thread_creation_function *func, void *arg)
 {
@@ -230,17 +207,6 @@ sys_mutex_unlock (sys_mutex_t *mutex)
 }
 
 void
-sys_mutex_destroy (sys_mutex_t *mutex)
-{
-  /* FIXME: According to MSDN, deleting a critical session that is
-     owned by a thread leaves the other threads waiting for the
-     critical session in an undefined state.  Posix docs seem to say
-     the same about pthread_mutex_destroy.  Do we need to protect
-     against such calamities?  */
-  DeleteCriticalSection ((LPCRITICAL_SECTION)mutex);
-}
-
-void
 sys_cond_init (sys_cond_t *cond)
 {
   cond->initialized = false;
@@ -346,12 +312,6 @@ sys_thread_self (void)
   return (sys_thread_t) GetCurrentThreadId ();
 }
 
-int
-sys_thread_equal (sys_thread_t one, sys_thread_t two)
-{
-  return one == two;
-}
-
 static thread_creation_function *thread_start_address;
 
 /* _beginthread wants a void function, while we are passed a function
diff --git a/src/systhread.h b/src/systhread.h
index c007d3ceb53..c7999c0651d 100644
--- a/src/systhread.h
+++ b/src/systhread.h
@@ -92,7 +92,6 @@ typedef void *(thread_creation_function) (void *);
 extern void sys_mutex_init (sys_mutex_t *);
 extern void sys_mutex_lock (sys_mutex_t *);
 extern void sys_mutex_unlock (sys_mutex_t *);
-extern void sys_mutex_destroy (sys_mutex_t *);
 
 extern void sys_cond_init (sys_cond_t *);
 extern void sys_cond_wait (sys_cond_t *, sys_mutex_t *);
@@ -101,7 +100,6 @@ extern void sys_cond_broadcast (sys_cond_t *);
 extern void sys_cond_destroy (sys_cond_t *);
 
 extern sys_thread_t sys_thread_self (void);
-extern int sys_thread_equal (sys_thread_t, sys_thread_t);
 
 extern int sys_thread_create (sys_thread_t *, const char *,
                               thread_creation_function *,