Change two windows_thread_info members to "bool"

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.

gdb/ChangeLog
2020-04-08  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.

gdbserver/ChangeLog
2020-04-08  Tom Tromey  <tromey@adacore.com>

	* win32-i386-low.c (update_debug_registers)
	(i386_prepare_to_resume, i386_thread_added): Update.

5 files changed, 24 insertions, 8 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index f0b1f33..6fce48c 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,13 @@
 2020-04-08  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.
+
+2020-04-08  Tom Tromey  <tromey@adacore.com>
+
 	* windows-nat.c (windows_add_thread): Use new.
 	(windows_init_thread_list, windows_delete_thread): Use delete.
 	(get_windows_debug_event): Update.
diff --git a/gdb/nat/windows-nat.h b/gdb/nat/windows-nat.h
index a3da268..27fd7ed 100644
--- a/gdb/nat/windows-nat.h
+++ b/gdb/nat/windows-nat.h
@@ -48,7 +48,10 @@ 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 or that the thread was
+     explicitly not suspended, 1 means it was called, and 0 means it
+     was not.  */
   int suspended = 0;
 
 #ifdef _WIN32_WCE
@@ -67,11 +70,11 @@ 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 715cf60..b7f21cb 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -439,7 +439,7 @@ 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;
       }
@@ -695,7 +695,7 @@ 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)
diff --git a/gdbserver/ChangeLog b/gdbserver/ChangeLog
index be2f767..25b5768 100644
--- a/gdbserver/ChangeLog
+++ b/gdbserver/ChangeLog
@@ -1,5 +1,10 @@
 2020-04-08  Tom Tromey  <tromey@adacore.com>
 
+	* win32-i386-low.c (update_debug_registers)
+	(i386_prepare_to_resume, i386_thread_added): Update.
+
+2020-04-08  Tom Tromey  <tromey@adacore.com>
+
 	* win32-low.c (child_add_thread): Use new.
 	(delete_thread_info): Use delete.
 
diff --git a/gdbserver/win32-i386-low.cc b/gdbserver/win32-i386-low.cc
index 29ee49f..1b78cf9 100644
--- a/gdbserver/win32-i386-low.cc
+++ b/gdbserver/win32-i386-low.cc
@@ -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