From 4335003e2e7d704f5f1d229b6a08cdb97088f785 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Tue, 26 Apr 2011 12:04:07 -0700
Subject: uhd: added scoped lock to device find and make (for thread safety)

---
 host/lib/device.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'host/lib')

diff --git a/host/lib/device.cpp b/host/lib/device.cpp
index 1b3daa103..b2b0238d2 100644
--- a/host/lib/device.cpp
+++ b/host/lib/device.cpp
@@ -25,10 +25,13 @@
 #include <boost/weak_ptr.hpp>
 #include <boost/functional/hash.hpp>
 #include <boost/tuple/tuple.hpp>
+#include <boost/thread/mutex.hpp>
 #include <iostream>
 
 using namespace uhd;
 
+static boost::mutex _device_mutex;
+
 /***********************************************************************
  * Helper Functions
  **********************************************************************/
@@ -70,6 +73,8 @@ void device::register_device(
  * Discover
  **********************************************************************/
 device_addrs_t device::find(const device_addr_t &hint){
+    boost::mutex::scoped_lock lock(_device_mutex);
+
     device_addrs_t device_addrs;
 
     BOOST_FOREACH(const dev_fcn_reg_t &fcn, get_dev_fcn_regs()){
@@ -93,6 +98,8 @@ device_addrs_t device::find(const device_addr_t &hint){
  * Make
  **********************************************************************/
 device::sptr device::make(const device_addr_t &hint, size_t which){
+    boost::mutex::scoped_lock lock(_device_mutex);
+
     typedef boost::tuple<device_addr_t, make_t> dev_addr_make_t;
     std::vector<dev_addr_make_t> dev_addr_makers;
 
-- 
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