[PATCH 6/9] Change two windows_thread_info members to "bool"

[Tom Tromey <tromey at adacore dot com>]

This changes a couple of fields of windows_thread_info to have type
"bool".  It also updates the comment of another field, to clarify the
possible values it can hold.

2019-10-14  Tom Tromey  <tromey@adacore.com>

	* windows-nat.c (thread_rec)
	(windows_nat_target::fetch_registers): Update.
	* nat/windows-nat.h (struct windows_thread_info) <suspended>:
	Update comment.
	<debug_registers_changed, reload_context>: Now bool.

gdb/gdbserver/ChangeLog
2019-10-14  Tom Tromey  <tromey@adacore.com>

	* win32-i386-low.c (update_debug_registers)
	(i386_prepare_to_resume, i386_thread_added): Update.
---
 gdb/ChangeLog                  | 8 ++++++++
 gdb/gdbserver/ChangeLog        | 5 +++++
 gdb/gdbserver/win32-i386-low.c | 6 +++---
 gdb/nat/windows-nat.h          | 8 +++++---
 gdb/windows-nat.c              | 4 ++--
 5 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/gdb/gdbserver/win32-i386-low.c b/gdb/gdbserver/win32-i386-low.c
index 3fc0cf1cd03..b834b160d9a 100644
--- a/gdb/gdbserver/win32-i386-low.c
+++ b/gdb/gdbserver/win32-i386-low.c
@@ -44,7 +44,7 @@ update_debug_registers (thread_info *thread)
 
   /* The actual update is done later just before resuming the lwp,
      we just mark that the registers need updating.  */
-  th->debug_registers_changed = 1;
+  th->debug_registers_changed = true;
 }
 
 /* Update the inferior's debug register REGNUM from STATE.  */
@@ -253,14 +253,14 @@ i386_prepare_to_resume (windows_thread_info *th)
 	 FIXME: should we set dr6 also ?? */
       th->context.Dr7 = dr->dr_control_mirror;
 
-      th->debug_registers_changed = 0;
+      th->debug_registers_changed = false;
     }
 }
 
 static void
 i386_thread_added (windows_thread_info *th)
 {
-  th->debug_registers_changed = 1;
+  th->debug_registers_changed = true;
 }
 
 static void
diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h
index 2fe2a2f0e88..0cfc0716f26 100644
--- a/gdb/nat/windows-nat.h
+++ b/gdb/nat/windows-nat.h
@@ -46,7 +46,9 @@ struct windows_thread_info
   /* Thread Information Block address.  */
   CORE_ADDR thread_local_base;
 
-  /* Non zero if SuspendThread was called on this thread.  */
+  /* This keeps track of whether SuspendThread was called on this
+     thread.  -1 means there was a failure, 1 means it was called, and
+     0 means it was not.  */
   int suspended = 0;
 
 #ifdef _WIN32_WCE
@@ -59,11 +61,11 @@ struct windows_thread_info
 
   /* Whether debug registers changed since we last set CONTEXT back to
      the thread.  */
-  int debug_registers_changed = 0;
+  bool debug_registers_changed = false;
 
   /* Nonzero if CONTEXT is invalidated and must be re-read from the
      inferior thread.  */
-  int reload_context = 0;
+  bool reload_context = false;
 
   /* The name of the thread, allocated by xmalloc.  */
   char *name = nullptr;
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index 210bcfb6f7f..b38ff402cb5 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -400,7 +400,7 @@ thread_rec (DWORD id, int get_context)
 	      }
 	    else if (get_context < 0)
 	      th->suspended = -1;
-	    th->reload_context = 1;
+	    th->reload_context = true;
 	  }
 	return th;
       }
@@ -604,7 +604,7 @@ windows_nat_target::fetch_registers (struct regcache *regcache, int r)
 	      dr[7] = th->context.Dr7;
 	    }
 	}
-      th->reload_context = 0;
+      th->reload_context = false;
     }
 
   if (r < 0)
-- 
2.20.1