pmt: add memory test function and some new functions to libhelper

srclib/libhelper/include/libhelper/lib.hpp

@@ -81,12 +81,14 @@ private:
   std::vector<uint8_t *> _ptrs_u;
   std::vector<FILE *> _fps;
   std::vector<int> _fds;
+  std::vector<std::string_view> _files;
 
 public:
   ~garbageCollector();
 
   void delAfterProgress(char *&_ptr);
   void delAfterProgress(uint8_t *&_ptr);
+  void delFileAfterProgress(std::string_view path);
   void closeAfterProgress(FILE *&_fp);
   void closeAfterProgress(int _fd);
 };
@@ -151,6 +153,7 @@ std::string runCommandWithOutput(std::string_view cmd);
 std::string pathJoin(std::string base, std::string relative);
 std::string pathBasename(std::string_view entry);
 std::string pathDirname(std::string_view entry);
+uint64_t getRandomOffset(uint64_t size, uint64_t bufferSize);
 
 // Android
 std::string getProperty(std::string_view prop);

srclib/libhelper/src/Classes.cpp

@@ -95,6 +95,8 @@ garbageCollector::~garbageCollector() {
     close(fd);
   for (const auto &fp : _fps)
     fclose(fp);
+  for (const auto &file: _files)
+    eraseEntry(file);
 }
 
 void garbageCollector::delAfterProgress(char *&_ptr) {
@@ -103,6 +105,9 @@ void garbageCollector::delAfterProgress(char *&_ptr) {
 void garbageCollector::delAfterProgress(uint8_t *&_ptr) {
   _ptrs_u.push_back(_ptr);
 }
+void garbageCollector::delFileAfterProgress(const std::string_view path) {
+  _files.push_back(path);
+}
 void garbageCollector::closeAfterProgress(const int _fd) {
   _fds.push_back(_fd);
 }

srclib/libhelper/src/Utilities.cpp

@@ -216,5 +216,11 @@ bool reboot(const std::string_view arg) {
   return android_reboot(cmd, 0, arg.empty() ? nullptr : arg.data()) != -1;
 }
 
+uint64_t getRandomOffset(const uint64_t size, const uint64_t bufferSize) {
+  if (size <= bufferSize) return 0;
+  const uint64_t maxOffset = size - bufferSize;
+  return rand() % maxOffset;
+}
+
 std::string getLibVersion() { MKVERSION("libhelper"); }
 } // namespace Helper