Implement scheduler APIs

Add logic to implement following scheduler APIs
-zetSysmanSchedulerGetCurrentMode
-zetSysmanSchedulerGetTimeoutModeProperties
-zetSysmanSchedulerGetTimesliceModeProperties
-zetSysmanSchedulerSetTimeoutMode
-zetSysmanSchedulerSetTimesliceMode
-zetSysmanSchedulerSetExclusiveMode

Change-Id: I134b200ffd6b13bc50b1f38e955dd584455b4b38
Signed-off-by: Jitendra Sharma <jitendra.sharma@intel.com>

level_zero/tools/source/sysman/linux/fs_access.cpp

@@ -360,6 +360,24 @@ ze_result_t SysfsAccess::read(const std::string file, double &val) {
     return ZE_RESULT_SUCCESS;
 }
 
+ze_result_t SysfsAccess::read(const std::string file, uint64_t &val) {
+    std::string str;
+    ze_result_t result;
+
+    result = FsAccess::read(fullPath(file), str);
+    if (ZE_RESULT_SUCCESS != result) {
+        return result;
+    }
+
+    std::istringstream stream(str);
+    stream >> val;
+
+    if (stream.fail()) {
+        return ZE_RESULT_ERROR_UNKNOWN;
+    }
+    return ZE_RESULT_SUCCESS;
+}
+
 ze_result_t SysfsAccess::read(const std::string file, std::vector<std::string> &val) {
     // Prepend sysfs directory path and call the base read
     return FsAccess::read(fullPath(file), val);
@@ -390,6 +408,16 @@ ze_result_t SysfsAccess::write(const std::string file, const double val) {
     return FsAccess::write(fullPath(file), stream.str());
 }
 
+ze_result_t SysfsAccess::write(const std::string file, const uint64_t val) {
+    std::ostringstream stream;
+    stream << val;
+
+    if (stream.fail()) {
+        return ZE_RESULT_ERROR_UNKNOWN;
+    }
+    return FsAccess::write(fullPath(file), stream.str());
+}
+
 ze_result_t SysfsAccess::readSymLink(const std::string path, std::string &val) {
     // Prepend sysfs directory path and call the base readSymLink
     return FsAccess::readSymLink(fullPath(path).c_str(), val);