chore: import upstream snapshot with attribution

2026-07-13 13:33:03 +08:00
commit 5b57521aa1
8226 changed files with 3425766 additions and 0 deletions
@@ -0,0 +1,64 @@
+//
+//  JNIHelper.cpp
+//  MNN
+//
+//  Created by MNN on 2021/11/01
+//  Copyright © 2018, Alibaba Group Holding Limited
+//
+
+#if defined(ANDROID) || defined(__ANDROID__)
+
+#include "utils/JNIHelper.hpp"
+
+static JavaVM* gjvm = NULL;
+
+// Attaches JVM if needed. Needs to remember to detach JVM if this thread is not
+// initially attached.
+// See https://stackoverflow.com/questions/27923917/cant-execute-javavm-detachcurrentthread-attempting-to-detach-while-still-r/51501448
+JNIEnv* AttachCurrentThread(bool* needsDetach) {
+   if (gjvm == nullptr) {
+       return nullptr;
+   }
+   *needsDetach = false;
+   JNIEnv* env = nullptr;
+   jint ret = gjvm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6);
+   if (ret == JNI_EDETACHED || !env) {
+       JavaVMAttachArgs args;
+       args.version = JNI_VERSION_1_6;
+       args.group = nullptr;
+       args.name = nullptr;
+       ret = gjvm->AttachCurrentThread(&env, &args);
+       if (ret != JNI_OK) {
+           MNN_ERROR("Get JVM env failed!\n");
+           return nullptr;
+       }
+       *needsDetach = true;
+   }
+   return env;
+}
+
+jint DetachCurrentThread() {
+    return gjvm->DetachCurrentThread();
+}
+
+std::string getPackageName() {
+    FILE *cmdline = fopen("/proc/self/cmdline", "r");
+
+    if (!cmdline) {
+        MNN_ERROR("Cannot find %s\n", "/proc/self/cmdline");
+        return "";
+    }
+
+    char packageName[128] = { 0 };
+    fread(packageName, sizeof(packageName), 1, cmdline);
+    fclose(cmdline);
+    return std::string(packageName);
+}
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved) {
+    MNN_PRINT("JNI_OnLoad for MNN main package.");
+    gjvm = vm;
+    return JNI_VERSION_1_6;
+}
+
+#endif  // defined(ANDROID) || defined(__ANDROID__)