[PATCH] Replace some Boost classes with C++11

argilo at gmail.com argilo at gmail.com
Sun May 31 13:36:41 UTC 2020


From: Clayton Smith <argilo at gmail.com>

A lot of Boost functionality is available in C++11. Since GNU Radio is
moving away from Boost, it probably makes sense to do so in gr-osmosdr
as well.

This change removes all usage of boost::mutex,
boost::mutex::scoped_lock, boost::unique_lock, and
boost::condition_variable. It also removes usage of boost::shared_ptr
and boost::weak_ptr outside of block definitions (which must continue to
use Boost until GNU Radio 3.9).
---
 include/osmosdr/pimpl.h           |  6 +++---
 lib/airspy/airspy_source_c.cc     |  2 +-
 lib/airspy/airspy_source_c.h      |  9 +++++----
 lib/airspyhf/airspyhf_source_c.cc |  2 +-
 lib/airspyhf/airspyhf_source_c.h  |  9 +++++----
 lib/bladerf/bladerf_common.cc     | 15 +++++++--------
 lib/bladerf/bladerf_common.h      | 11 +++++------
 lib/device.cc                     |  6 +++---
 lib/freesrp/freesrp_common.cc     |  3 +--
 lib/freesrp/freesrp_common.h      |  3 ++-
 lib/hackrf/hackrf_sink_c.cc       |  4 ++--
 lib/hackrf/hackrf_source_c.cc     |  4 ++--
 lib/miri/miri_source_c.cc         |  6 +++---
 lib/miri/miri_source_c.h          |  9 +++++----
 lib/osmosdr/osmosdr_src_c.cc      |  6 +++---
 lib/osmosdr/osmosdr_src_c.h       |  9 +++++----
 lib/rfspace/rfspace_source_c.cc   |  6 +++---
 lib/rfspace/rfspace_source_c.h    | 15 ++++++++-------
 lib/rtl/rtl_source_c.cc           |  6 +++---
 lib/rtl/rtl_source_c.h            |  9 +++++----
 lib/sdrplay/sdrplay_source_c.h    |  7 ++++---
 lib/soapy/soapy_common.cc         |  4 ++--
 lib/soapy/soapy_common.h          |  5 +++--
 lib/soapy/soapy_sink_c.cc         |  4 ++--
 lib/soapy/soapy_source_c.cc       |  4 ++--
 25 files changed, 85 insertions(+), 79 deletions(-)

diff --git a/include/osmosdr/pimpl.h b/include/osmosdr/pimpl.h
index e1985b4392..3a99994879 100644
--- a/include/osmosdr/pimpl.h
+++ b/include/osmosdr/pimpl.h
@@ -18,7 +18,7 @@
 #ifndef INCLUDED_OSMOSDR_PIMPL_H
 #define INCLUDED_OSMOSDR_PIMPL_H
 
-#include <boost/shared_ptr.hpp>
+#include <memory>
 
 /*! \file pimpl.h
  * "Pimpl idiom" (pointer to implementation idiom).
@@ -39,7 +39,7 @@
  * \param _name the name of the pimpl class
  */
 #define OSMOSDR_PIMPL_DECL(_name) \
-    struct _name; boost::shared_ptr<_name>
+    struct _name; std::shared_ptr<_name>
 
 /*!
  * Make an instance of a pimpl in a source file.
@@ -49,6 +49,6 @@
  * \param _args the constructor args for the pimpl
  */
 #define OSMOSDR_PIMPL_MAKE(_name, _args) \
-    boost::shared_ptr<_name>(new _name _args)
+    std::shared_ptr<_name>(new _name _args)
 
 #endif /* INCLUDED_OSMOSDR_PIMPL_H */
diff --git a/lib/airspy/airspy_source_c.cc b/lib/airspy/airspy_source_c.cc
index 50150e510a..af578d0379 100644
--- a/lib/airspy/airspy_source_c.cc
+++ b/lib/airspy/airspy_source_c.cc
@@ -291,7 +291,7 @@ int airspy_source_c::work( int noutput_items,
   if ( ! running )
     return WORK_DONE;
 
-  boost::unique_lock<boost::mutex> lock(_fifo_lock);
+  std::unique_lock<std::mutex> lock(_fifo_lock);
 
   /* Wait until we have the requested number of samples */
   int n_samples_avail = _fifo->size();
diff --git a/lib/airspy/airspy_source_c.h b/lib/airspy/airspy_source_c.h
index f8617e62d0..a7d817fc61 100644
--- a/lib/airspy/airspy_source_c.h
+++ b/lib/airspy/airspy_source_c.h
@@ -23,8 +23,9 @@
 #define INCLUDED_AIRSPY_SOURCE_C_H
 
 #include <boost/circular_buffer.hpp>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include <gnuradio/sync_block.h>
 
@@ -128,8 +129,8 @@ private:
   airspy_device *_dev;
 
   boost::circular_buffer<gr_complex> *_fifo;
-  boost::mutex _fifo_lock;
-  boost::condition_variable _samp_avail;
+  std::mutex _fifo_lock;
+  std::condition_variable _samp_avail;
 
   std::vector< std::pair<double, uint32_t> > _sample_rates;
   double _sample_rate;
diff --git a/lib/airspyhf/airspyhf_source_c.cc b/lib/airspyhf/airspyhf_source_c.cc
index 327fe19b8d..f90b60b22d 100644
--- a/lib/airspyhf/airspyhf_source_c.cc
+++ b/lib/airspyhf/airspyhf_source_c.cc
@@ -239,7 +239,7 @@ int airspyhf_source_c::work( int noutput_items,
   if ( ! running )
     return WORK_DONE;
 
-  boost::unique_lock<boost::mutex> lock(_fifo_lock);
+  std::unique_lock<std::mutex> lock(_fifo_lock);
 
   /* Wait until we have the requested number of samples */
   int n_samples_avail = _fifo->size();
diff --git a/lib/airspyhf/airspyhf_source_c.h b/lib/airspyhf/airspyhf_source_c.h
index cfb8c89a7f..dbdd87ae0e 100644
--- a/lib/airspyhf/airspyhf_source_c.h
+++ b/lib/airspyhf/airspyhf_source_c.h
@@ -23,8 +23,9 @@
 #define INCLUDED_AIRSPYHF_SOURCE_C_H
 
 #include <boost/circular_buffer.hpp>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include <gnuradio/sync_block.h>
 
@@ -105,8 +106,8 @@ private:
   airspyhf_device *_dev;
 
   boost::circular_buffer<gr_complex> *_fifo;
-  boost::mutex _fifo_lock;
-  boost::condition_variable _samp_avail;
+  std::mutex _fifo_lock;
+  std::condition_variable _samp_avail;
 
   std::vector< std::pair<double, uint32_t> > _sample_rates;
   double _sample_rate;
diff --git a/lib/bladerf/bladerf_common.cc b/lib/bladerf/bladerf_common.cc
index 4327d44cb5..19b8a021a0 100644
--- a/lib/bladerf/bladerf_common.cc
+++ b/lib/bladerf/bladerf_common.cc
@@ -38,7 +38,6 @@
 #include <boost/foreach.hpp>
 #include <boost/format.hpp>
 #include <boost/lexical_cast.hpp>
-#include <boost/weak_ptr.hpp>
 
 #include "bladerf_common.h"
 
@@ -50,8 +49,8 @@ static size_t const STREAM_TIMEOUT_MS = 3000;
 
 using namespace boost::assign;
 
-boost::mutex bladerf_common::_devs_mutex;
-std::list<boost::weak_ptr<struct bladerf>> bladerf_common::_devs;
+std::mutex bladerf_common::_devs_mutex;
+std::list<std::weak_ptr<struct bladerf>> bladerf_common::_devs;
 
 /* name for system-wide gain (which is not its own libbladeRF gain stage) */
 static const char *SYSTEM_GAIN_NAME = "system";
@@ -1079,7 +1078,7 @@ bladerf_sptr bladerf_common::open(std::string const &device_name)
   struct bladerf *raw_dev = NULL;
   struct bladerf_devinfo devinfo;
 
-  boost::unique_lock<boost::mutex> lock(_devs_mutex);
+  std::lock_guard<std::mutex> lock(_devs_mutex);
 
   /* Initialize the information used to identify the desired device
    * to all wildcard (i.e., "any device") values */
@@ -1109,15 +1108,15 @@ bladerf_sptr bladerf_common::open(std::string const &device_name)
   /* Add the device handle to our cache */
   bladerf_sptr dev = bladerf_sptr(raw_dev, bladerf_common::close);
 
-  _devs.push_back(static_cast<boost::weak_ptr<struct bladerf>>(dev));
+  _devs.push_back(static_cast<std::weak_ptr<struct bladerf>>(dev));
 
   return dev;
 }
 
 void bladerf_common::close(void *dev)
 {
-  boost::unique_lock<boost::mutex> lock(_devs_mutex);
-  std::list<boost::weak_ptr<struct bladerf>>::iterator it(_devs.begin());
+  std::lock_guard<std::mutex> lock(_devs_mutex);
+  std::list<std::weak_ptr<struct bladerf>>::iterator it(_devs.begin());
 
   /* Prune expired entries from device cache */
   while (it != _devs.end()) {
@@ -1137,7 +1136,7 @@ bladerf_sptr bladerf_common::get_cached_device(struct bladerf_devinfo devinfo)
   int status;
   struct bladerf_devinfo other_devinfo;
 
-  BOOST_FOREACH(boost::weak_ptr<struct bladerf> dev, _devs) {
+  BOOST_FOREACH(std::weak_ptr<struct bladerf> dev, _devs) {
     status = bladerf_get_devinfo(bladerf_sptr(dev).get(), &other_devinfo);
     if (status < 0) {
       BLADERF_THROW_STATUS(status, "Failed to get devinfo for cached device");
diff --git a/lib/bladerf/bladerf_common.h b/lib/bladerf/bladerf_common.h
index 27afa83f45..741b1e75b4 100644
--- a/lib/bladerf/bladerf_common.h
+++ b/lib/bladerf/bladerf_common.h
@@ -23,12 +23,11 @@
 
 #include <list>
 #include <map>
+#include <memory>
+#include <mutex>
 #include <string>
 #include <vector>
 
-#include <boost/thread/mutex.hpp>
-#include <boost/weak_ptr.hpp>
-
 #include <libbladeRF.h>
 
 #include "osmosdr/ranges.h"
@@ -43,7 +42,7 @@ typedef ptrdiff_t ssize_t;
 
 #define BLADERF_DEBUG_ENABLE
 
-typedef boost::shared_ptr<struct bladerf> bladerf_sptr;
+typedef std::shared_ptr<struct bladerf> bladerf_sptr;
 
 /* Identification of the bladeRF hardware in use */
 typedef enum {
@@ -287,8 +286,8 @@ private:
   /*****************************************************************************
    * Private members
    ****************************************************************************/
-  static boost::mutex _devs_mutex;  /**< mutex for access to _devs */
-  static std::list<boost::weak_ptr<struct bladerf>> _devs;  /**< dev cache */
+  static std::mutex _devs_mutex;  /**< mutex for access to _devs */
+  static std::list<std::weak_ptr<struct bladerf>> _devs;  /**< dev cache */
 };
 
 #endif
diff --git a/lib/device.cc b/lib/device.cc
index 586062fa89..015383dbd4 100644
--- a/lib/device.cc
+++ b/lib/device.cc
@@ -22,8 +22,8 @@
 #include <stdexcept>
 #include <boost/foreach.hpp>
 #include <boost/format.hpp>
-#include <boost/thread/mutex.hpp>
 #include <algorithm>
+#include <mutex>
 #include <sstream>
 
 #ifdef HAVE_CONFIG_H
@@ -102,7 +102,7 @@ static const std::string args_delim = " ";
 static const std::string pairs_delim = ",";
 static const std::string pair_delim = "=";
 
-static boost::mutex _device_mutex;
+static std::mutex _device_mutex;
 
 device_t::device_t(const std::string &args)
 {
@@ -141,7 +141,7 @@ std::string device_t::to_string(void) const
 
 devices_t device::find(const device_t &hint)
 {
-  boost::mutex::scoped_lock lock(_device_mutex);
+  std::lock_guard<std::mutex> lock(_device_mutex);
 
   bool fake = true;
 
diff --git a/lib/freesrp/freesrp_common.cc b/lib/freesrp/freesrp_common.cc
index d60fbb84b0..57bbdbba0a 100644
--- a/lib/freesrp/freesrp_common.cc
+++ b/lib/freesrp/freesrp_common.cc
@@ -2,7 +2,6 @@
 
 #include <cstdlib>
 
-#include <boost/make_shared.hpp>
 #include <boost/assign.hpp>
 
 #include <arg_helpers.h>
@@ -11,7 +10,7 @@ using namespace FreeSRP;
 using namespace std;
 using namespace boost::assign;
 
-boost::shared_ptr<::FreeSRP::FreeSRP> freesrp_common::_srp;
+std::shared_ptr<::FreeSRP::FreeSRP> freesrp_common::_srp;
 
 freesrp_common::freesrp_common(const string &args)
 {
diff --git a/lib/freesrp/freesrp_common.h b/lib/freesrp/freesrp_common.h
index 9a5687ca46..8d13c47cef 100644
--- a/lib/freesrp/freesrp_common.h
+++ b/lib/freesrp/freesrp_common.h
@@ -1,6 +1,7 @@
 #ifndef INCLUDED_FREESRP_COMMON_H
 #define INCLUDED_FREESRP_COMMON_H
 
+#include <memory>
 #include <vector>
 #include <string>
 
@@ -22,7 +23,7 @@ public:
     double set_freq_corr( double ppm, size_t chan = 0 );
     double get_freq_corr( size_t chan = 0 );
 protected:
-    static boost::shared_ptr<::FreeSRP::FreeSRP> _srp;
+    static std::shared_ptr<::FreeSRP::FreeSRP> _srp;
     bool _ignore_overflow = false;
 };
 
diff --git a/lib/hackrf/hackrf_sink_c.cc b/lib/hackrf/hackrf_sink_c.cc
index 7271109b15..1762934443 100644
--- a/lib/hackrf/hackrf_sink_c.cc
+++ b/lib/hackrf/hackrf_sink_c.cc
@@ -196,7 +196,7 @@ int hackrf_sink_c::hackrf_tx_callback(unsigned char *buffer, uint32_t length)
     *buffer++ = rand() % 255;
 #else
   {
-    std::unique_lock<std::mutex> lock(_buf_mutex);
+    std::lock_guard<std::mutex> lock(_buf_mutex);
 
     if ( ! cb_pop_front( &_cbuf, buffer ) ) {
       memset(buffer, 0, length);
@@ -372,7 +372,7 @@ int hackrf_sink_c::work( int noutput_items,
 
   if((unsigned int)noutput_items >= remaining) {
     {
-      std::unique_lock<std::mutex> lock(_buf_mutex);
+      std::lock_guard<std::mutex> lock(_buf_mutex);
 
       if ( ! cb_push_back( &_cbuf, _buf ) ) {
         _buf_used = prev_buf_used;
diff --git a/lib/hackrf/hackrf_source_c.cc b/lib/hackrf/hackrf_source_c.cc
index eea5caafda..0c0ae21eb6 100644
--- a/lib/hackrf/hackrf_source_c.cc
+++ b/lib/hackrf/hackrf_source_c.cc
@@ -151,7 +151,7 @@ int hackrf_source_c::_hackrf_rx_callback(hackrf_transfer *transfer)
 int hackrf_source_c::hackrf_rx_callback(unsigned char *buf, uint32_t len)
 {
   {
-    std::unique_lock<std::mutex> lock(_buf_mutex);
+    std::lock_guard<std::mutex> lock(_buf_mutex);
 
     int buf_tail = (_buf_head + _buf_used) % _buf_num;
     memcpy(_buf[buf_tail], buf, len);
@@ -231,7 +231,7 @@ int hackrf_source_c::work( int noutput_items,
       *out++ = _lut[ *(buf + i) ];
 
     {
-      std::unique_lock<std::mutex> lock(_buf_mutex);
+      std::lock_guard<std::mutex> lock(_buf_mutex);
 
       _buf_head = (_buf_head + 1) % _buf_num;
       _buf_used--;
diff --git a/lib/miri/miri_source_c.cc b/lib/miri/miri_source_c.cc
index c9f81fac3b..c1b9428fbb 100644
--- a/lib/miri/miri_source_c.cc
+++ b/lib/miri/miri_source_c.cc
@@ -182,7 +182,7 @@ void miri_source_c::mirisdr_callback(unsigned char *buf, uint32_t len)
   }
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::lock_guard<std::mutex> lock( _buf_mutex );
 
     if (len > BUF_SIZE)
       throw std::runtime_error("Buffer too small.");
@@ -226,7 +226,7 @@ int miri_source_c::work( int noutput_items,
   gr_complex *out = (gr_complex *)output_items[0];
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::unique_lock<std::mutex> lock( _buf_mutex );
 
     while (_buf_used < 3 && _running) // collect at least 3 buffers
       _buf_cond.wait( lock );
@@ -250,7 +250,7 @@ int miri_source_c::work( int noutput_items,
                            float(*(buf + i * 2 + 1)) * (1.0f/4096.0f) );
 
     {
-      boost::mutex::scoped_lock lock( _buf_mutex );
+      std::lock_guard<std::mutex> lock( _buf_mutex );
 
       _buf_head = (_buf_head + 1) % _buf_num;
       _buf_used--;
diff --git a/lib/miri/miri_source_c.h b/lib/miri/miri_source_c.h
index 5363db5382..1ea906f27a 100644
--- a/lib/miri/miri_source_c.h
+++ b/lib/miri/miri_source_c.h
@@ -23,8 +23,9 @@
 #include <gnuradio/sync_block.h>
 
 #include <gnuradio/thread/thread.h>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include "source_iface.h"
 
@@ -120,8 +121,8 @@ private:
   unsigned int _buf_num;
   unsigned int _buf_head;
   unsigned int _buf_used;
-  boost::mutex _buf_mutex;
-  boost::condition_variable _buf_cond;
+  std::mutex _buf_mutex;
+  std::condition_variable _buf_cond;
   bool _running;
 
   unsigned int _buf_offset;
diff --git a/lib/osmosdr/osmosdr_src_c.cc b/lib/osmosdr/osmosdr_src_c.cc
index de65373cb6..e4f8b89944 100644
--- a/lib/osmosdr/osmosdr_src_c.cc
+++ b/lib/osmosdr/osmosdr_src_c.cc
@@ -179,7 +179,7 @@ void osmosdr_src_c::osmosdr_callback(unsigned char *buf, uint32_t len)
   }
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::lock_guard<std::mutex> lock( _buf_mutex );
 
     int buf_tail = (_buf_head + _buf_used) % _buf_num;
     memcpy(_buf[buf_tail], buf, len);
@@ -219,7 +219,7 @@ int osmosdr_src_c::work( int noutput_items,
   gr_complex *out = (gr_complex *)output_items[0];
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::unique_lock<std::mutex> lock( _buf_mutex );
 
     while (_buf_used < 3 && _running) // collect at least 3 buffers
       _buf_cond.wait( lock );
@@ -243,7 +243,7 @@ int osmosdr_src_c::work( int noutput_items,
                            float(*(buf + i * 2 + 1)) * (1.0f/32767.5f) );
 
     {
-      boost::mutex::scoped_lock lock( _buf_mutex );
+      std::lock_guard<std::mutex> lock( _buf_mutex );
 
       _buf_head = (_buf_head + 1) % _buf_num;
       _buf_used--;
diff --git a/lib/osmosdr/osmosdr_src_c.h b/lib/osmosdr/osmosdr_src_c.h
index 0f62b09b2c..f8f18ec776 100644
--- a/lib/osmosdr/osmosdr_src_c.h
+++ b/lib/osmosdr/osmosdr_src_c.h
@@ -23,8 +23,9 @@
 #include <gnuradio/sync_block.h>
 
 #include <gnuradio/thread/thread.h>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include "source_iface.h"
 
@@ -124,8 +125,8 @@ private:
   unsigned int _buf_len;
   unsigned int _buf_head;
   unsigned int _buf_used;
-  boost::mutex _buf_mutex;
-  boost::condition_variable _buf_cond;
+  std::mutex _buf_mutex;
+  std::condition_variable _buf_cond;
   bool _running;
 
   unsigned int _buf_offset;
diff --git a/lib/rfspace/rfspace_source_c.cc b/lib/rfspace/rfspace_source_c.cc
index 80f34df3c6..121dcde032 100644
--- a/lib/rfspace/rfspace_source_c.cc
+++ b/lib/rfspace/rfspace_source_c.cc
@@ -590,7 +590,7 @@ bool rfspace_source_c::transaction( const unsigned char *cmd, size_t size,
     if ( write(_usb, cmd, size) != (int)size )
       return false;
 
-    boost::unique_lock<boost::mutex> lock(_resp_lock);
+    std::unique_lock<std::mutex> lock(_resp_lock);
     _resp_avail.wait(lock);
 
     rx_bytes = _resp.size();
@@ -598,7 +598,7 @@ bool rfspace_source_c::transaction( const unsigned char *cmd, size_t size,
   }
   else
   {
-    boost::mutex::scoped_lock lock(_tcp_lock);
+    std::lock_guard<std::mutex> lock(_tcp_lock);
 
 #ifdef USE_ASIO
     _t.write_some( boost::asio::buffer(cmd, size) );
@@ -829,7 +829,7 @@ int rfspace_source_c::work( int noutput_items,
     {
       gr_complex *out = (gr_complex *)output_items[0];
 
-      boost::unique_lock<boost::mutex> lock(_fifo_lock);
+      std::unique_lock<std::mutex> lock(_fifo_lock);
 
       /* Wait until we have the requested number of samples */
       int n_samples_avail = _fifo->size();
diff --git a/lib/rfspace/rfspace_source_c.h b/lib/rfspace/rfspace_source_c.h
index c65606348b..a51bfc6f8a 100644
--- a/lib/rfspace/rfspace_source_c.h
+++ b/lib/rfspace/rfspace_source_c.h
@@ -30,8 +30,9 @@
 #include <gnuradio/sync_block.h>
 
 #include <boost/circular_buffer.hpp>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include "osmosdr/ranges.h"
 #include "source_iface.h"
@@ -164,15 +165,15 @@ private: /* members */
   gr::thread::thread _thread;
   bool _run_usb_read_task;
   bool _run_tcp_keepalive_task;
-  boost::mutex _tcp_lock;
+  std::mutex _tcp_lock;
 
   boost::circular_buffer<gr_complex> *_fifo;
-  boost::mutex _fifo_lock;
-  boost::condition_variable _samp_avail;
+  std::mutex _fifo_lock;
+  std::condition_variable _samp_avail;
 
   std::vector< unsigned char > _resp;
-  boost::mutex _resp_lock;
-  boost::condition_variable _resp_avail;
+  std::mutex _resp_lock;
+  std::condition_variable _resp_avail;
 };
 
 #endif /* INCLUDED_RFSPACE_SOURCE_C_H */
diff --git a/lib/rtl/rtl_source_c.cc b/lib/rtl/rtl_source_c.cc
index a37146402a..e312ed79ec 100644
--- a/lib/rtl/rtl_source_c.cc
+++ b/lib/rtl/rtl_source_c.cc
@@ -298,7 +298,7 @@ void rtl_source_c::rtlsdr_callback(unsigned char *buf, uint32_t len)
   }
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::lock_guard<std::mutex> lock( _buf_mutex );
 
     int buf_tail = (_buf_head + _buf_used) % _buf_num;
     memcpy(_buf[buf_tail], buf, len);
@@ -338,7 +338,7 @@ int rtl_source_c::work( int noutput_items,
   gr_complex *out = (gr_complex *)output_items[0];
 
   {
-    boost::mutex::scoped_lock lock( _buf_mutex );
+    std::unique_lock<std::mutex> lock( _buf_mutex );
 
     while (_buf_used < 3 && _running) // collect at least 3 buffers
       _buf_cond.wait( lock );
@@ -359,7 +359,7 @@ int rtl_source_c::work( int noutput_items,
 
     if (!_samp_avail) {
       {
-        boost::mutex::scoped_lock lock( _buf_mutex );
+        std::lock_guard<std::mutex> lock( _buf_mutex );
 
         _buf_head = (_buf_head + 1) % _buf_num;
         _buf_used--;
diff --git a/lib/rtl/rtl_source_c.h b/lib/rtl/rtl_source_c.h
index 902b386ae8..de3e349b26 100644
--- a/lib/rtl/rtl_source_c.h
+++ b/lib/rtl/rtl_source_c.h
@@ -25,8 +25,9 @@
 #include <gnuradio/sync_block.h>
 
 #include <gnuradio/thread/thread.h>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include "source_iface.h"
 
@@ -131,8 +132,8 @@ private:
   unsigned int _buf_len;
   unsigned int _buf_head;
   unsigned int _buf_used;
-  boost::mutex _buf_mutex;
-  boost::condition_variable _buf_cond;
+  std::mutex _buf_mutex;
+  std::condition_variable _buf_cond;
   bool _running;
 
   unsigned int _buf_offset;
diff --git a/lib/sdrplay/sdrplay_source_c.h b/lib/sdrplay/sdrplay_source_c.h
index 2e4631ea8c..b59f44a754 100644
--- a/lib/sdrplay/sdrplay_source_c.h
+++ b/lib/sdrplay/sdrplay_source_c.h
@@ -24,8 +24,9 @@
 #include <gnuradio/sync_block.h>
 
 #include <gnuradio/thread/thread.h>
-#include <boost/thread/mutex.hpp>
-#include <boost/thread/condition_variable.hpp>
+
+#include <mutex>
+#include <condition_variable>
 
 #include "osmosdr/ranges.h"
 
@@ -126,7 +127,7 @@ private:
    std::vector< short > _bufi;
    std::vector< short > _bufq;
    int _buf_offset;
-   boost::mutex _buf_mutex;
+   std::mutex _buf_mutex;
 
    bool _running;
    bool _uninit;
diff --git a/lib/soapy/soapy_common.cc b/lib/soapy/soapy_common.cc
index 0e277e4e21..e241967bb9 100644
--- a/lib/soapy/soapy_common.cc
+++ b/lib/soapy/soapy_common.cc
@@ -36,8 +36,8 @@ osmosdr::gain_range_t soapy_range_to_gain_range(const SoapySDR::Range &r)
     return osmosdr::gain_range_t(r.minimum(), r.maximum(), step);
 }
 
-boost::mutex &get_soapy_maker_mutex(void)
+std::mutex &get_soapy_maker_mutex(void)
 {
-    static boost::mutex m;
+    static std::mutex m;
     return m;
 }
diff --git a/lib/soapy/soapy_common.h b/lib/soapy/soapy_common.h
index 87e46a5730..8adb0db515 100644
--- a/lib/soapy/soapy_common.h
+++ b/lib/soapy/soapy_common.h
@@ -23,7 +23,8 @@
 
 #include <osmosdr/ranges.h>
 #include <SoapySDR/Types.hpp>
-#include <boost/thread/mutex.hpp>
+
+#include <mutex>
 
 /*!
  * Convert a soapy range to a gain range.
@@ -35,6 +36,6 @@ osmosdr::gain_range_t soapy_range_to_gain_range(const SoapySDR::Range &r);
  * Global mutex to protect factory routines.
  * (optional under 0.5 release above)
  */
-boost::mutex &get_soapy_maker_mutex(void);
+std::mutex &get_soapy_maker_mutex(void);
 
 #endif /* INCLUDED_SOAPY_COMMON_H */
diff --git a/lib/soapy/soapy_sink_c.cc b/lib/soapy/soapy_sink_c.cc
index b12b8daca2..e4422f7f45 100644
--- a/lib/soapy/soapy_sink_c.cc
+++ b/lib/soapy/soapy_sink_c.cc
@@ -63,7 +63,7 @@ soapy_sink_c::soapy_sink_c (const std::string &args)
                     gr::io_signature::make (0, 0, 0))
 {
     {
-        boost::mutex::scoped_lock l(get_soapy_maker_mutex());
+        std::lock_guard<std::mutex> l(get_soapy_maker_mutex());
         _device = SoapySDR::Device::make(params_to_dict(args));
     }
     _nchan = std::max(1, args_to_io_signature(args)->max_streams());
@@ -75,7 +75,7 @@ soapy_sink_c::soapy_sink_c (const std::string &args)
 soapy_sink_c::~soapy_sink_c(void)
 {
     _device->closeStream(_stream);
-    boost::mutex::scoped_lock l(get_soapy_maker_mutex());
+    std::lock_guard<std::mutex> l(get_soapy_maker_mutex());
     SoapySDR::Device::unmake(_device);
 }
 
diff --git a/lib/soapy/soapy_source_c.cc b/lib/soapy/soapy_source_c.cc
index a6453618ab..3f65b2766c 100644
--- a/lib/soapy/soapy_source_c.cc
+++ b/lib/soapy/soapy_source_c.cc
@@ -64,7 +64,7 @@ soapy_source_c::soapy_source_c (const std::string &args)
                     args_to_io_signature(args))
 {
     {
-        boost::mutex::scoped_lock l(get_soapy_maker_mutex());
+        std::lock_guard<std::mutex> l(get_soapy_maker_mutex());
         _device = SoapySDR::Device::make(params_to_dict(args));
     }
     _nchan = std::max(1, args_to_io_signature(args)->max_streams());
@@ -76,7 +76,7 @@ soapy_source_c::soapy_source_c (const std::string &args)
 soapy_source_c::~soapy_source_c(void)
 {
     _device->closeStream(_stream);
-    boost::mutex::scoped_lock l(get_soapy_maker_mutex());
+    std::lock_guard<std::mutex> l(get_soapy_maker_mutex());
     SoapySDR::Device::unmake(_device);
 }
 
-- 
2.25.1



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