Merge Android 12

Bug: 202323961
Merged-In: Ifb27b3eb12454fa96f07e6797745c697b4f831c4
Change-Id: I2a7f5931477fddb51564c2eabcdc96ce58888ce8

1 files changed, 19 insertions, 19 deletions

diff --git a/vulkan/libvulkan/api.cpp b/vulkan/libvulkan/api.cpp
index 9aaac5f1d6..d1cd397da4 100644
--- a/vulkan/libvulkan/api.cpp
+++ b/vulkan/libvulkan/api.cpp
@@ -1184,23 +1184,18 @@ const LayerChain::ActiveLayer* LayerChain::GetActiveLayers(
 // ----------------------------------------------------------------------------
 
 bool EnsureInitialized() {
-    static std::once_flag once_flag;
-    static bool initialized;
-
-    std::call_once(once_flag, []() {
-        if (driver::OpenHAL()) {
-            initialized = true;
-        }
-    });
-
-    {
-        static pid_t pid = getpid() + 1;
-        static std::mutex layer_lock;
-        std::lock_guard<std::mutex> lock(layer_lock);
-        if (pid != getpid()) {
-            pid = getpid();
-            DiscoverLayers();
-        }
+    static bool initialized = false;
+    static pid_t init_attempted_for_pid = 0;
+    static std::mutex init_lock;
+
+    std::lock_guard<std::mutex> lock(init_lock);
+    if (init_attempted_for_pid == getpid())
+        return initialized;
+
+    init_attempted_for_pid = getpid();
+    if (driver::OpenHAL()) {
+        DiscoverLayers();
+        initialized = true;
     }
 
     return initialized;
@@ -1266,7 +1261,7 @@ VkResult EnumerateInstanceLayerProperties(uint32_t* pPropertyCount,
     ATRACE_CALL();
 
     if (!EnsureInitialized())
-        return VK_ERROR_INITIALIZATION_FAILED;
+        return VK_ERROR_OUT_OF_HOST_MEMORY;
 
     uint32_t count = GetLayerCount();
 
@@ -1290,7 +1285,7 @@ VkResult EnumerateInstanceExtensionProperties(
     ATRACE_CALL();
 
     if (!EnsureInitialized())
-        return VK_ERROR_INITIALIZATION_FAILED;
+        return VK_ERROR_OUT_OF_HOST_MEMORY;
 
     if (pLayerName) {
         const Layer* layer = FindLayer(pLayerName);
@@ -1466,6 +1461,11 @@ VkResult EnumerateDeviceExtensionProperties(
 VkResult EnumerateInstanceVersion(uint32_t* pApiVersion) {
     ATRACE_CALL();
 
+    // Load the driver here if not done yet. This api will be used in Zygote
+    // for Vulkan driver pre-loading because of the minimum overhead.
+    if (!EnsureInitialized())
+        return VK_ERROR_OUT_OF_HOST_MEMORY;
+
     *pApiVersion = VK_API_VERSION_1_1;
     return VK_SUCCESS;
 }