st/clover: provide a path for drivers to call through to pfn_notify

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>

[ Francisco Jerez: Clean up clover::context interface by passing
  around a function object. ]

src/gallium/state_trackers/clover/api/context.cpp

@@ -45,8 +45,13 @@ clCreateContext(const cl_context_properties *d_props, cl_uint num_devs,
          throw error(CL_INVALID_PROPERTY);
    }
 
+   const auto notify = (!pfn_notify ? context::notify_action() :
+                        [=](const char *s) {
+                           pfn_notify(s, NULL, 0, user_data);
+                        });
+
    ret_error(r_errcode, CL_SUCCESS);
-   return desc(new context(props, devs));
+   return desc(new context(props, devs, notify));
 
 } catch (error &e) {
    ret_error(r_errcode, e);

src/gallium/state_trackers/clover/core/context.cpp

@@ -25,8 +25,9 @@
 using namespace clover;
 
 context::context(const property_list &props,
-                 const ref_vector<device> &devs) :
-   props(props), devs(devs) {
+                 const ref_vector<device> &devs,
+                 const notify_action &notify) :
+   notify(notify), props(props), devs(devs) {
 }
 
 bool

src/gallium/state_trackers/clover/core/context.hpp

@@ -36,7 +36,10 @@ namespace clover {
       typedef clover::property_list<cl_context_properties> property_list;
 
    public:
-      context(const property_list &props, const ref_vector<device> &devs);
+      typedef std::function<void (const char *)> notify_action;
+
+      context(const property_list &props, const ref_vector<device> &devs,
+              const notify_action &notify);
 
       context(const context &ctx) = delete;
       context &
@@ -53,6 +56,8 @@ namespace clover {
       device_range
       devices() const;
 
+      const notify_action notify;
+
    private:
       property_list props;
       const std::vector<intrusive_ref<device>> devs;

src/gallium/state_trackers/clover/core/queue.cpp

@@ -24,15 +24,36 @@
 #include "core/event.hpp"
 #include "pipe/p_screen.h"
 #include "pipe/p_context.h"
+#include "pipe/p_state.h"
 
 using namespace clover;
 
+namespace {
+   void
+   debug_notify_callback(void *data,
+                         unsigned *id,
+                         enum pipe_debug_type type,
+                         const char *fmt,
+                         va_list args) {
+      const command_queue *queue = (const command_queue *)data;
+      char buffer[1024];
+      vsnprintf(buffer, sizeof(buffer), fmt, args);
+      queue->context().notify(buffer);
+   }
+}
+
 command_queue::command_queue(clover::context &ctx, clover::device &dev,
                              cl_command_queue_properties props) :
    context(ctx), device(dev), props(props) {
    pipe = dev.pipe->context_create(dev.pipe, NULL, PIPE_CONTEXT_COMPUTE_ONLY);
    if (!pipe)
       throw error(CL_INVALID_DEVICE);
+
+   if (ctx.notify) {
+      struct pipe_debug_callback cb = { &debug_notify_callback, this };
+      if (pipe->set_debug_callback)
+         pipe->set_debug_callback(pipe, &cb);
+   }
 }
 
 command_queue::~command_queue() {