add new 1.21.90.23 functions (#42)

Author: GameParrot

src/common.cpp

@@ -693,6 +693,7 @@ void shim::add_sched_shimmed_symbols(std::vector<shim::shimmed_symbol> &list) {
     list.insert(list.end(), {
         {"sched_yield", ::sched_yield},
         {"sched_setaffinity", sched_setaffinity},
+        {"sched_getaffinity", sched_getaffinity},
     });
 }
 

src/sched.cpp

@@ -1,11 +1,19 @@
 #include "sched.h"
 
-
-
 int shim::sched_setaffinity(pid_t pid, size_t cpusetsize, const void *mask) {
     int ret;
 #ifdef __linux__
-    ret = ::sched_setaffinity(pid,cpusetsize,(cpu_set_t *)mask);
+    ret = ::sched_setaffinity(pid, cpusetsize, (cpu_set_t *)mask);
+#else
+    ret = 0;
+#endif
+    return ret;
+}
+
+int shim::sched_getaffinity(pid_t pid, size_t cpusetsize, const void *mask) {
+    int ret;
+#ifdef __linux__
+    ret = ::sched_getaffinity(pid, cpusetsize, (cpu_set_t *)mask);
 #else
     ret = 0;
 #endif

src/sched.h

@@ -4,6 +4,6 @@
 #include <sched.h>
 
 namespace shim {
-    int sched_setaffinity(pid_t pid, size_t set_size, const void* mask);
-
-}
+int sched_setaffinity(pid_t pid, size_t set_size, const void* mask);
+int sched_getaffinity(pid_t pid, size_t cpusetsize, const void* mask);
+}  // namespace shim