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

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This commit is contained in:
Andreas Kling 2020-01-02 13:37:02 +01:00
parent c01f766fb2
commit 907b090ddf
3 changed files with 17 additions and 4 deletions
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6
Libraries/LibC/serenity.cpp
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@ -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);
}
}

5
Libraries/LibC/serenity.h
View file

@ -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

10
Userland/purge.cpp
View file

@ -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;
}