SamplingBar: Improved event loop protection

diff --git a/pv/toolbars/samplingbar.cpp b/pv/toolbars/samplingbar.cpp
index 35de916b6ef76465535f9852c65a4dc88437960c..e55bbda8316cb4482dd9f9ec2ef4b57a46773d12 100644 (file)
--- a/pv/toolbars/samplingbar.cpp
+++ b/pv/toolbars/samplingbar.cpp
@@ -164,10 +164,14 @@ void SamplingBar::update_sample_rate_selector()
        const uint64_t *elements = NULL;
        gsize num_elements;
 
+       if (_updating_sample_rate)
+               return;
+
        const shared_ptr<DevInst> dev_inst = get_selected_device();
        if (!dev_inst)
                return;
 
+       assert(!_updating_sample_rate);
        _updating_sample_rate = true;
 
        if (!(gvar_dict = dev_inst->list_config(NULL, SR_CONF_SAMPLERATE)))
@@ -224,6 +228,9 @@ void SamplingBar::update_sample_rate_selector_value()
        GVariant *gvar;
        uint64_t samplerate;
 
+       if (_updating_sample_rate)
+               return;
+
        const shared_ptr<DevInst> dev_inst = get_selected_device();
        if (!dev_inst)
                return;
@@ -235,6 +242,7 @@ void SamplingBar::update_sample_rate_selector_value()
        samplerate = g_variant_get_uint64(gvar);
        g_variant_unref(gvar);
 
+       assert(!_updating_sample_rate);
        _updating_sample_rate = true;
        _sample_rate.set_value(samplerate);
        _updating_sample_rate = false;
@@ -244,10 +252,14 @@ void SamplingBar::update_sample_count_selector()
 {
        GVariant *gvar;
 
+       if (_updating_sample_count)
+               return;
+
        const shared_ptr<DevInst> dev_inst = get_selected_device();
        if (!dev_inst)
                return;
 
+       assert(!_updating_sample_count);
        _updating_sample_count = true;
 
        if (_sample_count_supported)
@@ -292,6 +304,9 @@ void SamplingBar::commit_sample_count()
 {
        uint64_t sample_count = 0;
 
+       if (_updating_sample_count)
+               return;
+
        const shared_ptr<DevInst> dev_inst = get_selected_device();
        if (!dev_inst)
                return;
@@ -299,17 +314,23 @@ void SamplingBar::commit_sample_count()
        sample_count = _sample_count.value();
 
        // Set the sample count
+       assert(!_updating_sample_count);
+       _updating_sample_count = true;
        if (!dev_inst->set_config(NULL, SR_CONF_LIMIT_SAMPLES,
                g_variant_new_uint64(sample_count))) {
                qDebug() << "Failed to configure sample count.";
                return;
        }
+       _updating_sample_count = false;
 }
 
 void SamplingBar::commit_sample_rate()
 {
        uint64_t sample_rate = 0;
 
+       if (_updating_sample_rate)
+               return;
+
        const shared_ptr<DevInst> dev_inst = get_selected_device();
        if (!dev_inst)
                return;
@@ -319,11 +340,14 @@ void SamplingBar::commit_sample_rate()
                return;
 
        // Set the samplerate
+       assert(!_updating_sample_rate);
+       _updating_sample_rate = true;
        if (!dev_inst->set_config(NULL, SR_CONF_SAMPLERATE,
                g_variant_new_uint64(sample_rate))) {
                qDebug() << "Failed to configure samplerate.";
                return;
        }
+       _updating_sample_rate = false;
 }
 
 void SamplingBar::on_device_selected()
@@ -381,14 +405,12 @@ void SamplingBar::on_device_selected()
 
 void SamplingBar::on_sample_count_changed()
 {
-       if(!_updating_sample_count)
-               commit_sample_count();
+       commit_sample_count();
 }
 
 void SamplingBar::on_sample_rate_changed()
 {
-       if (!_updating_sample_rate)
-               commit_sample_rate();
+       commit_sample_rate();
 }
 
 void SamplingBar::on_run_stop()