diff options
| -rw-r--r-- | src/core/CL/OpenCL.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/core/CL/OpenCL.cpp b/src/core/CL/OpenCL.cpp index aff6285697..dd9960a7b3 100644 --- a/src/core/CL/OpenCL.cpp +++ b/src/core/CL/OpenCL.cpp @@ -152,6 +152,23 @@ bool CLSymbols::load(const std::string &library) bool opencl_is_available() { CLSymbols::get().load_default(); + + // Using static objects that rely on OpenCL in their constructor or + // destructor is implementation defined according to the OpenCL API + // Specification. These objects include CLScheduler. + // + // For compatibility with OpenCL runtimes that also use static objects to + // hold their state, we call a harmless OpenCL function (clGetPlatformIDs + // with invalid parameters must result in CL_INVALID_VALUE) to ensure the + // runtimes have a chance to initialize their static objects first. Thanks + // to C++11 rules about normal program termination (cf [basic.start]), this + // ensures their static objects are destroyed last, i.e. after the + // singleton CLScheduler is destroyed. + // + // When OpenCL is not available, this call results in CL_OUT_OF_RESOURCES, + // which is equally harmless. + (void)clGetPlatformIDs(0, nullptr, nullptr); + return CLSymbols::get().clBuildProgram_ptr != nullptr; } } // namespace arm_compute |