[pushed] gdbserver: no point in hiding the regcache type nowadays

[Pedro Alves <palves at redhat dot com>]

The regcache used to be hidden inside inferiors.c, but since the
tracepoints support that it's a first class object.  This also fixes a
few implicit pointer conversion errors in C++ mode, caused by a few
places missing the explicit cast.

gdb/gdbserver/ChangeLog:
2015-08-06  Pedro Alves  <palves@redhat.com>

	* gdbthread.h (struct regcache): Forward declare.
	(struct thread_info) <regcache_data>: Now a struct regcache
	pointer.
	* inferiors.c (inferior_regcache_data)
	(set_inferior_regcache_data): Now work with struct regcache
	pointers.
	* inferiors.h (struct regcache): Forward declare.
	(inferior_regcache_data, set_inferior_regcache_data): Now work
	with struct regcache pointers.
	* regcache.c (get_thread_regcache, regcache_invalidate_thread)
	(free_register_cache_thread): Remove struct regcache pointer
	casts.
---
 gdb/gdbserver/ChangeLog   | 15 +++++++++++++++
 gdb/gdbserver/gdbthread.h |  3 ++-
 gdb/gdbserver/inferiors.c |  4 ++--
 gdb/gdbserver/inferiors.h |  5 +++--
 gdb/gdbserver/regcache.c  |  7 +++----
 5 files changed, 25 insertions(+), 9 deletions(-)

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 1c1bb5e..5f08417 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,5 +1,20 @@
 2015-08-06  Pedro Alves  <palves@redhat.com>
 
+	* gdbthread.h (struct regcache): Forward declare.
+	(struct thread_info) <regcache_data>: Now a struct regcache
+	pointer.
+	* inferiors.c (inferior_regcache_data)
+	(set_inferior_regcache_data): Now work with struct regcache
+	pointers.
+	* inferiors.h (struct regcache): Forward declare.
+	(inferior_regcache_data, set_inferior_regcache_data): Now work
+	with struct regcache pointers.
+	* regcache.c (get_thread_regcache, regcache_invalidate_thread)
+	(free_register_cache_thread): Remove struct regcache pointer
+	casts.
+
+2015-08-06  Pedro Alves  <palves@redhat.com>
+
 	* server.c (captured_main): On error, print the exception message
 	to stderr, and if run_once is set, throw a quit.
 
diff --git a/gdb/gdbserver/gdbthread.h b/gdb/gdbserver/gdbthread.h
index b3e3e9d..d6959f4 100644
--- a/gdb/gdbserver/gdbthread.h
+++ b/gdb/gdbserver/gdbthread.h
@@ -22,6 +22,7 @@
 #include "inferiors.h"
 
 struct btrace_target_info;
+struct regcache;
 
 struct thread_info
 {
@@ -30,7 +31,7 @@ struct thread_info
   struct inferior_list_entry entry;
 
   void *target_data;
-  void *regcache_data;
+  struct regcache *regcache_data;
 
   /* The last resume GDB requested on this thread.  */
   enum resume_kind last_resume_kind;
diff --git a/gdb/gdbserver/inferiors.c b/gdb/gdbserver/inferiors.c
index 7c5a1e0..d7ad347 100644
--- a/gdb/gdbserver/inferiors.c
+++ b/gdb/gdbserver/inferiors.c
@@ -230,14 +230,14 @@ set_inferior_target_data (struct thread_info *inferior, void *data)
   inferior->target_data = data;
 }
 
-void *
+struct regcache *
 inferior_regcache_data (struct thread_info *inferior)
 {
   return inferior->regcache_data;
 }
 
 void
-set_inferior_regcache_data (struct thread_info *inferior, void *data)
+set_inferior_regcache_data (struct thread_info *inferior, struct regcache *data)
 {
   inferior->regcache_data = data;
 }
diff --git a/gdb/gdbserver/inferiors.h b/gdb/gdbserver/inferiors.h
index 0569586..88ebbe3 100644
--- a/gdb/gdbserver/inferiors.h
+++ b/gdb/gdbserver/inferiors.h
@@ -33,6 +33,7 @@ struct inferior_list_entry
 };
 
 struct thread_info;
+struct regcache;
 struct target_desc;
 struct sym_cache;
 struct breakpoint;
@@ -147,7 +148,7 @@ struct inferior_list_entry *find_inferior_id (struct inferior_list *list,
 
 void *inferior_target_data (struct thread_info *);
 void set_inferior_target_data (struct thread_info *, void *);
-void *inferior_regcache_data (struct thread_info *);
-void set_inferior_regcache_data (struct thread_info *, void *);
+struct regcache *inferior_regcache_data (struct thread_info *);
+void set_inferior_regcache_data (struct thread_info *, struct regcache *);
 
 #endif /* INFERIORS_H */
diff --git a/gdb/gdbserver/regcache.c b/gdb/gdbserver/regcache.c
index 8d7957b..ef955ff 100644
--- a/gdb/gdbserver/regcache.c
+++ b/gdb/gdbserver/regcache.c
@@ -28,7 +28,7 @@ get_thread_regcache (struct thread_info *thread, int fetch)
 {
   struct regcache *regcache;
 
-  regcache = (struct regcache *) inferior_regcache_data (thread);
+  regcache = inferior_regcache_data (thread);
 
   /* Threads' regcaches are created lazily, because biarch targets add
      the main thread/lwp before seeing it stop for the first time, and
@@ -76,7 +76,7 @@ regcache_invalidate_thread (struct thread_info *thread)
 {
   struct regcache *regcache;
 
-  regcache = (struct regcache *) inferior_regcache_data (thread);
+  regcache = inferior_regcache_data (thread);
 
   if (regcache == NULL)
     return;
@@ -277,8 +277,7 @@ find_register_by_number (const struct target_desc *tdesc, int n)
 static void
 free_register_cache_thread (struct thread_info *thread)
 {
-  struct regcache *regcache
-    = (struct regcache *) inferior_regcache_data (thread);
+  struct regcache *regcache = inferior_regcache_data (thread);
 
   if (regcache != NULL)
     {
-- 
1.9.3