From 1cb8033b10290d5dba7b458ddf93b89d8fb70643 Mon Sep 17 00:00:00 2001
From: Jelle Foks <jfoks@google.com>
Date: Wed, 10 Jan 2024 10:37:36 -0800
Subject: [PATCH] Strip absl not compatible with Starboard.

---
 third_party/abseil-cpp/absl/base/BUILD.gn     |  2 +
 .../absl/base/internal/spinlock_starboard.inc | 46 +++++++++++++++++++
 .../absl/base/internal/spinlock_wait.cc       |  2 +-
 .../abseil-cpp/absl/synchronization/BUILD.gn  |  2 +
 4 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 third_party/abseil-cpp/absl/base/internal/spinlock_starboard.inc

diff --git a/third_party/abseil-cpp/absl/base/BUILD.gn b/third_party/abseil-cpp/absl/base/BUILD.gn
index 3f525ac92e2e..e95dc8f207f4 100644
--- a/third_party/abseil-cpp/absl/base/BUILD.gn
+++ b/third_party/abseil-cpp/absl/base/BUILD.gn
@@ -46,6 +46,7 @@ absl_source_set("spinlock_wait") {
     "internal/spinlock_akaros.inc",
     "internal/spinlock_linux.inc",
     "internal/spinlock_posix.inc",
+    "internal/spinlock_starboard.inc",
     "internal/spinlock_wait.cc",
     "internal/spinlock_win32.inc",
   ]
@@ -54,6 +55,7 @@ absl_source_set("spinlock_wait") {
     ":base_internal",
     ":core_headers",
     ":errno_saver",
+    "//starboard:starboard_headers_only",
   ]
   visibility = [ "//third_party/abseil-cpp/absl/base:*" ]
 }
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock_starboard.inc b/third_party/abseil-cpp/absl/base/internal/spinlock_starboard.inc
new file mode 100644
index 000000000000..d39a33f82a88
--- /dev/null
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock_starboard.inc
@@ -0,0 +1,46 @@
+// Copyright 2017 The Abseil Authors.
+//
+// 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.
+//
+// This file is a Posix-specific part of spinlock_wait.cc
+
+#if defined(STARBOARD)
+#include "starboard/thread.h"
+
+#include <atomic>
+#include <ctime>
+
+#include "absl/base/internal/errno_saver.h"
+#include "absl/base/internal/scheduling_mode.h"
+#include "absl/base/port.h"
+
+extern "C" {
+
+ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(AbslInternalSpinLockDelay)(
+    std::atomic<uint32_t>* /* lock_word */, uint32_t /* value */, int loop,
+    absl::base_internal::SchedulingMode /* mode */) {
+  absl::base_internal::ErrnoSaver errno_saver;
+  if (loop == 0) {
+  } else if (loop == 1) {
+    SbThreadYield();
+  } else {
+    SbThreadSleep(loop);
+  }
+}
+
+ABSL_ATTRIBUTE_WEAK void ABSL_INTERNAL_C_SYMBOL(AbslInternalSpinLockWake)(
+    std::atomic<uint32_t>* /* lock_word */, bool /* all */) {}
+
+}  // extern "C"
+
+#endif
diff --git a/third_party/abseil-cpp/absl/base/internal/spinlock_wait.cc b/third_party/abseil-cpp/absl/base/internal/spinlock_wait.cc
index 0d990bdf8e96..edbd90eab431 100644
--- a/third_party/abseil-cpp/absl/base/internal/spinlock_wait.cc
+++ b/third_party/abseil-cpp/absl/base/internal/spinlock_wait.cc
@@ -22,7 +22,7 @@
 #include "absl/base/internal/spinlock_wait.h"
 
 #if defined(STARBOARD)
-#include "absl/base/internal/spinlock_posix.inc"
+#include "absl/base/internal/spinlock_starboard.inc"
 #elif defined(_WIN32)
 #include "absl/base/internal/spinlock_win32.inc"
 #elif defined(__linux__)
diff --git a/third_party/abseil-cpp/absl/synchronization/BUILD.gn b/third_party/abseil-cpp/absl/synchronization/BUILD.gn
index 7e45ee211d9d..0e690d3ee78b 100644
--- a/third_party/abseil-cpp/absl/synchronization/BUILD.gn
+++ b/third_party/abseil-cpp/absl/synchronization/BUILD.gn
@@ -42,6 +42,7 @@ absl_test("kernel_timeout_internal_test") {
 }
 
 absl_source_set("synchronization") {
+  if (!use_cobalt_customizations) {
   sources = [
     "barrier.cc",
     "blocking_counter.cc",
@@ -87,6 +88,7 @@ absl_source_set("synchronization") {
     "//third_party/abseil-cpp/absl/debugging:symbolize",
     "//third_party/abseil-cpp/absl/time",
   ]
+  }
 }
 
 absl_test("waiter_test") {