LibC+Userland: Add a proper syscall wrapper for purge()

fleximus · Jan 2, 2020 · 907b090 · 907b090
1 parent c01f766
commit 907b090
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Showing 3 changed files with 17 additions and 4 deletions.
diff --git a/Libraries/LibC/serenity.cpp b/Libraries/LibC/serenity.cpp
@@ -47,4 +47,10 @@ int futex(int32_t* userspace_address, int futex_op, int32_t value, const struct
  __RETURN_WITH_ERRNO(rc, rc, -1);
 }
 
+int purge(int mode)
+{
+ int rc = syscall(SC_purge, mode);
+ __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
 }
diff --git a/Libraries/LibC/serenity.h b/Libraries/LibC/serenity.h
@@ -58,4 +58,9 @@ int set_process_boost(pid_t, int amount);
 
 int futex(int32_t* userspace_address, int futex_op, int32_t value, const struct timespec* timeout);
 
+#define PURGE_ALL_VOLATILE 0x1
+#define PURGE_ALL_CLEAN_INODE 0x2
+
+int purge(int mode);
+
 __END_DECLS
diff --git a/Userland/purge.cpp b/Userland/purge.cpp
@@ -1,10 +1,8 @@
 #include <Kernel/Syscall.h>
+#include <serenity.h>
 #include <stdio.h>
 #include <string.h>
 
-#define PURGE_ALL_VOLATILE 0x1
-#define PURGE_ALL_CLEAN_INODE 0x2
-
 int main(int argc, char** argv)
 {
  int mode = 0;
@@ -20,7 +18,11 @@ int main(int argc, char** argv)
  return 1;
  }
  }
- int purged_page_count = syscall(SC_purge, mode);
+ int purged_page_count = purge(mode);
+ if (purged_page_count < 0) {
+ perror("purge");
+ return 1;
+ }
  printf("Purged page count: %d\n", purged_page_count);
  return 0;
 }