diff options
Diffstat (limited to 'gold/target-select.h')
| -rw-r--r-- | gold/target-select.h | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/gold/target-select.h b/gold/target-select.h index d1cd44f..4e2ea92 100644 --- a/gold/target-select.h +++ b/gold/target-select.h @@ -1,6 +1,6 @@ // target-select.h -- select a target for an object file -*- C++ -*- -// Copyright 2006, 2007, 2008 Free Software Foundation, Inc. +// Copyright 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. // Written by Ian Lance Taylor <iant@google.com>. // This file is part of gold. @@ -31,6 +31,24 @@ namespace gold { class Target; +class Target_selector; + +// Used to set the target only once. + +class Set_target_once : public Once +{ + public: + Set_target_once(Target_selector* target_selector) + : target_selector_(target_selector) + { } + + protected: + void + do_run_once(void*); + + private: + Target_selector* target_selector_; +}; // We want to avoid a master list of targets, which implies using a // global constructor. And we also want the program to start up as @@ -141,6 +159,12 @@ class Target_selector instantiate_target(); private: + // Set the target. + void + set_target(); + + friend class Set_target_once; + // ELF machine code. const int machine_; // Target size--32 or 64. @@ -154,11 +178,8 @@ class Target_selector // The singleton Target structure--this points to an instance of the // real implementation. Target* instantiated_target_; - // Lock to make sure that we don't instantiate the target more than - // once. - Lock* lock_; - // We only want to initialize the lock_ pointer once. - Initialize_lock initialize_lock_; + // Used to set the target only once. + Set_target_once set_target_once_; }; // Select the target for an ELF file. |