2 files changed, 30 insertions, 2 deletions
diff --git a/arm_compute/core/utils/misc/Utility.h b/arm_compute/core/utils/misc/Utility.h
index 646d66567a..648758ca07 100644
--- a/arm_compute/core/utils/misc/Utility.h
+++ b/arm_compute/core/utils/misc/Utility.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019 Arm Limited.
+ * Copyright (c) 2017-2021 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -24,6 +24,8 @@
 #ifndef ARM_COMPUTE_MISC_UTILITY_H
 #define ARM_COMPUTE_MISC_UTILITY_H
 
+#include "arm_compute/core/Error.h"
+
 #include <algorithm>
 #include <array>
 #include <limits>
@@ -208,6 +210,25 @@ inline std::string tolower(std::string string)
     });
     return string;
 }
+
+/** Get environment variable as a string
+ *
+ * @note Return empty string on bare-metal
+ *
+ * @param[in] env_name Name of the Environment variable to retrieve
+ *
+ * @return Environment variable content, or empty string if the variable is undefined or on bare-metal
+ */
+inline std::string getenv(const std::string &env_name)
+{
+#ifdef BARE_METAL
+    ARM_COMPUTE_UNUSED(env_name);
+    return std::string{};
+#else  // BARE_METAL
+    const auto env_chr = std::getenv(env_name.c_str());
+    return env_chr == nullptr ? std::string{} : std::string{ env_chr };
+#endif // BARE_METAL
+}
 } // namespace utility
 } // namespace arm_compute
 #endif /* ARM_COMPUTE_MISC_UTILITY_H */
diff --git a/arm_compute/runtime/CPP/CPPScheduler.h b/arm_compute/runtime/CPP/CPPScheduler.h
index f4f6a1311e..a5932d6301 100644
--- a/arm_compute/runtime/CPP/CPPScheduler.h
+++ b/arm_compute/runtime/CPP/CPPScheduler.h
@@ -31,7 +31,14 @@
 
 namespace arm_compute
 {
-/** C++11 implementation of a pool of threads to automatically split a kernel's execution among several threads. */
+/** C++11 implementation of a pool of threads to automatically split a kernel's execution among several threads.
+ *
+ * It has 2 scheduling modes: Linear or Fanout (please refer to the implementation for details)
+ * The mode is selected automatically based on the runtime environment. However it can be forced via an environment
+ * variable ARM_COMPUTE_CPP_SCHEDULER_MODE. e.g.:
+ * ARM_COMPUTE_CPP_SCHEDULER_MODE=linear      # Force select the linear scheduling mode
+ * ARM_COMPUTE_CPP_SCHEDULER_MODE=fanout      # Force select the fanout scheduling mode
+*/
 class CPPScheduler final : public IScheduler
 {
 public: