IVGCVSW-5095 Make timeline report the Linux Thread ID not the pthread ID

Change-Id: Id69519fd9ef57716de4e389ed4156710a904c701
Signed-off-by: Jim Flynn <jim.flynn@arm.com>
diff --git a/src/profiling/ProfilingUtils.hpp b/src/profiling/ProfilingUtils.hpp
index 95fa780..2ead316 100644
--- a/src/profiling/ProfilingUtils.hpp
+++ b/src/profiling/ProfilingUtils.hpp
@@ -28,7 +28,7 @@
 namespace profiling
 {
 
-constexpr unsigned int ThreadIdSize = sizeof(std::thread::id); // Is platform dependent
+constexpr unsigned int ThreadIdSize = sizeof(int); // Is platform dependent
 
 struct SwTraceHeader
 {
@@ -245,7 +245,7 @@
                                                    unsigned int& numberOfBytesWritten);
 
 TimelinePacketStatus WriteTimelineEventBinary(uint64_t timestamp,
-                                              std::thread::id threadId,
+                                              int threadId,
                                               uint64_t profilingGuid,
                                               unsigned char* buffer,
                                               unsigned int bufferSize,
@@ -271,6 +271,6 @@
 namespace std
 {
 
-bool operator==(const std::vector<uint8_t>& left, std::thread::id right);
+bool operator==(const std::vector<uint8_t>& left, int right);
 
 } // namespace std