adds sync wrappers

Author: MichealReed

cmake/example.cmake

@@ -54,7 +54,6 @@ if(EMSCRIPTEN)
         -sUSE_GLFW=3 \
         -sALLOW_MEMORY_GROWTH=1 -sSTACK_SIZE=15MB \
         -sASYNCIFY \
-        -sASYNCIFY_DEBUG \
         --js-library=${DAWN_BUILD_DIR}/gen/src/emdawnwebgpu/library_webgpu_enum_tables.js \
         --js-library=${DAWN_BUILD_DIR}/gen/src/emdawnwebgpu/library_webgpu_generated_struct_info.js \
         --js-library=${DAWN_BUILD_DIR}/gen/src/emdawnwebgpu/library_webgpu_generated_sig_info.js \

examples/hello_world/run.cpp

@@ -28,22 +28,19 @@ int main(int argc, char **argv) {
   printf("--------------\n\n");
 
   // std::unique_ptr<Context> ctx = createContext();
-  Context ctx = waitForContext();
+  Context ctx = createContext();
   static constexpr size_t N = 10000;
   std::array<float, N> inputArr, outputArr;
   for (int i = 0; i < N; ++i) {
     inputArr[i] = static_cast<float>(i) / 10.0; // dummy input data
   }
   Tensor input = createTensor(ctx, Shape{N}, kf32, inputArr.data());
   Tensor output = createTensor(ctx, Shape{N}, kf32);
-  std::future<Kernel> kernelFuture = createKernel(ctx, {kGelu, 256, kf32},
+  Kernel op = createKernel(ctx, {kGelu, 256, kf32},
                            Bindings{input, output},
                            {cdiv(N, 256), 1, 1});
-  Kernel op = waitForFuture(ctx.instance, kernelFuture);
-  std::future<void> dispatchFuture = dispatchKernel(ctx, op);
-  waitForFuture(ctx.instance, dispatchFuture);
-  std::future<void> cpuFuture = toCPU(ctx, output, outputArr.data(), sizeof(outputArr));
-  waitForFuture(ctx.instance, cpuFuture);
+  dispatchKernel(ctx, op);
+  toCPU(ctx, output, outputArr.data(), sizeof(outputArr));
   for (int i = 0; i < 12; ++i) {
     printf("  gelu(%.2f) = %.2f\n", inputArr[i], outputArr[i]);
   }

examples/render/run.cpp

@@ -124,10 +124,8 @@ int main(int argc, char **argv) {
                                      cdiv({NCOLS, NROWS, 1}, wgSize), params);
   printf("\033[2J\033[H");
   while (true) {
-    std::promise<void> promise;
-    std::future<void> future = promise.get_future();
-    dispatchKernel(ctx, renderKernel, promise);
-    wait(ctx, future);
+
+    dispatchKernel(ctx, renderKernel);
     toCPU(ctx, devScreen, screen.data(), sizeof(screen));
     params.time = getCurrentTimeInMilliseconds() - zeroTime;