[SYCL] Make cl::sycl::event::get() method to be constant. (#1591)

According to recent changes(1) in SYCL-1.2.1 spec method
`cl::sycl::event::get()` is supposed to be constant.

(1) KhronosGroup/SYCL-Docs#95

Signed-off-by: Ivan Karachun <[email protected]>

Author: Ivan Karachun

sycl/include/CL/sycl/event.hpp

@@ -54,7 +54,7 @@ class __SYCL_EXPORT event {
   /// Returns a valid OpenCL event interoperability handle.
   ///
   /// \return a valid instance of OpenCL cl_event.
-  cl_event get();
+  cl_event get() const;
 
   /// Checks if this event is a SYCL host event.
   ///

sycl/source/event.cpp

@@ -31,7 +31,7 @@ bool event::operator==(const event &rhs) const { return rhs.impl == impl; }
 
 bool event::operator!=(const event &rhs) const { return !(*this == rhs); }
 
-cl_event event::get() { return impl->get(); }
+cl_event event::get() const { return impl->get(); }
 
 bool event::is_host() const { return impl->is_host(); }
 

sycl/test/abi/sycl_symbols_linux.dump

@@ -3102,7 +3102,6 @@ _ZN2cl4sycl4freeEPvRKNS0_7contextE
 _ZN2cl4sycl5event13get_wait_listEv
 _ZN2cl4sycl5event14wait_and_throwERKSt6vectorIS1_SaIS1_EE
 _ZN2cl4sycl5event14wait_and_throwEv
-_ZN2cl4sycl5event3getEv
 _ZN2cl4sycl5event4waitERKSt6vectorIS1_SaIS1_EE
 _ZN2cl4sycl5event4waitEv
 _ZN2cl4sycl5eventC1EP9_cl_eventRKNS0_7contextE
@@ -3278,6 +3277,7 @@ _ZNK2cl4sycl20accelerator_selectorclERKNS0_6deviceE
 _ZNK2cl4sycl5event18get_profiling_infoILNS0_4info15event_profilingE4737EEENS3_12param_traitsIS4_XT_EE11return_typeEv
 _ZNK2cl4sycl5event18get_profiling_infoILNS0_4info15event_profilingE4738EEENS3_12param_traitsIS4_XT_EE11return_typeEv
 _ZNK2cl4sycl5event18get_profiling_infoILNS0_4info15event_profilingE4739EEENS3_12param_traitsIS4_XT_EE11return_typeEv
+_ZNK2cl4sycl5event3getEv
 _ZNK2cl4sycl5event7is_hostEv
 _ZNK2cl4sycl5event8get_infoILNS0_4info5eventE4562EEENS3_12param_traitsIS4_XT_EE11return_typeEv
 _ZNK2cl4sycl5event8get_infoILNS0_4info5eventE4563EEENS3_12param_traitsIS4_XT_EE11return_typeEv