COMPMID-3782: Delay initialization of Scheduler

To fix the deadlock in multi-process use-case,
Scheduler object is initialized when it is actually
referenced using get() method for the first time
instead of the beginning of the program.

Change-Id: Ib2dd47795011cf6137b1454c78d91736deb80a8b
Signed-off-by: Sang-Hoon Park <sang-hoon.park@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4052
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Giuseppe Rossini <giuseppe.rossini@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/src/runtime/Scheduler.cpp b/src/runtime/Scheduler.cpp
index 4063cc1c00..5b3010b173 100644
--- a/src/runtime/Scheduler.cpp
+++ b/src/runtime/Scheduler.cpp
@@ -67,7 +67,7 @@ std::map<Scheduler::Type, std::unique_ptr<IScheduler>> init()
 }
 } // namespace
 
-std::map<Scheduler::Type, std::unique_ptr<IScheduler>> Scheduler::_schedulers = init();
+std::map<Scheduler::Type, std::unique_ptr<IScheduler>> Scheduler::_schedulers{};
 
 void Scheduler::set(Type t)
 {
@@ -107,6 +107,11 @@ IScheduler &Scheduler::get()
     }
     else
     {
+        if(_schedulers.empty())
+        {
+            _schedulers = init();
+        }
+
         auto it = _schedulers.find(_scheduler_type);
         if(it != _schedulers.end())
         {