1 files changed, 84 insertions, 0 deletions
diff --git a/src/gl/error.cc b/src/gl/error.cc
new file mode 100644
index 0000000..20b2c74
--- /dev/null
+++ b/src/gl/error.cc
@@ -0,0 +1,84 @@
+// Copyright 2021 Benjamin Barenblat
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "src/gl/error.h"
+
+#include <new>
+#include <stdexcept>
+#include <thread>
+
+#include "third_party/glew/include/GL/glew.h"
+#include "third_party/abseil/absl/base/const_init.h"
+#include "third_party/abseil/absl/synchronization/mutex.h"
+#include "third_party/abseil/absl/types/optional.h"
+#include "third_party/abseil/absl/meta/type_traits.h"
+
+namespace gl_internal {
+
+#ifndef GLPLANET_DISABLE_GL_THREAD_SAFETY_CHECKS
+
+namespace {
+
+ABSL_CONST_INIT absl::Mutex thread_id_mu(absl::kConstInit);
+ABSL_CONST_INIT absl::optional<std::thread::id> thread_id;
+static_assert(absl::is_trivially_destructible<decltype(thread_id)>::value);
+
+}  // namespace
+
+void RecordThreadImpl() {
+  absl::MutexLock lock(&thread_id_mu);
+  if (thread_id.has_value()) {
+    throw std::logic_error("GL: gl_internal::RecordThread called twice");
+  }
+  thread_id = std::this_thread::get_id();
+}
+
+void CheckThreadSafetyImpl() {
+  absl::MutexLock lock(&thread_id_mu);
+  if (!thread_id.has_value()) {
+    throw std::logic_error(
+        "GL: gl_internal::CheckThreadSafety called before "
+        "gl_internal::RecordThread");
+  }
+  if (std::this_thread::get_id() != *thread_id) {
+    throw std::logic_error("GL: detected access from multiple threads");
+  }
+}
+
+#endif  // !defined(GLPLANET_DISABLE_GL_THREAD_SAFETY_CHECKS)
+
+void ErrorCheck() {
+  switch (glGetError()) {
+    case GL_NO_ERROR:
+      return;
+    case GL_INVALID_ENUM:
+      throw std::invalid_argument(
+          "GL: unacceptable value specified for enumerated argument");
+    case GL_INVALID_VALUE:
+      throw std::out_of_range("GL: numeric argument out of range");
+    case GL_INVALID_OPERATION:
+      throw std::logic_error(
+          "GL: specified operation not allowed in current state");
+    case GL_INVALID_FRAMEBUFFER_OPERATION:
+      throw std::logic_error("GL: framebuffer object is not complete");
+    case GL_OUT_OF_MEMORY:
+      throw std::bad_alloc();
+    case GL_STACK_UNDERFLOW:
+      throw std::runtime_error("GL: stack underflow");
+    case GL_STACK_OVERFLOW:
+      throw std::runtime_error("GL: stack overflow");
+  }
+}
+
+}  // namespace gl_internal