[PATCH] ntdll: Report system information SystemPerformanceInformation info class. (v2)

[Vijay Kiran Kamuju]

From: Michael Müller <michael at fds-team.de>

Remove extra ifdefs

From: Michael Müller <michael at fds-team.de>
Signed-off-by: Vijay Kiran Kamuju <infyquest at gmail.com>
---
 dlls/ntdll/nt.c | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/dlls/ntdll/nt.c b/dlls/ntdll/nt.c
index f429349698..687f31bd4f 100644
--- a/dlls/ntdll/nt.c
+++ b/dlls/ntdll/nt.c
@@ -30,6 +30,9 @@
 #ifdef HAVE_SYS_SYSCTL_H
 # include <sys/sysctl.h>
 #endif
+#ifdef HAVE_SYS_SYSINFO_H
+# include <sys/sysinfo.h>
+#endif
 #ifdef HAVE_MACHINE_CPU_H
 # include <machine/cpu.h>
 #endif
@@ -2319,6 +2322,37 @@ NTSTATUS WINAPI NtQuerySystemInformation(
                 spi.IdleTime.QuadPart = ++idle;
             }
 
+#ifdef HAVE_SYSINFO
+            struct sysinfo sinfo;
+
+            if (!sysinfo(&sinfo))
+            {
+                ULONG64 freeram   = (ULONG64)sinfo.freeram * sinfo.mem_unit;
+                ULONG64 totalram  = (ULONG64)sinfo.totalram * sinfo.mem_unit;
+                ULONG64 totalswap = (ULONG64)sinfo.totalswap * sinfo.mem_unit;
+                ULONG64 freeswap  = (ULONG64)sinfo.freeswap * sinfo.mem_unit;
+
+                if ((fp = fopen("/proc/meminfo", "r")))
+                {
+                    unsigned long long available;
+                    char line[64];
+                    while (fgets(line, sizeof(line), fp))
+                    {
+                        if (sscanf(line, "MemAvailable: %llu kB", &available) == 1)
+                        {
+                            freeram = min(available * 1024, totalram);
+                            break;
+                        }
+                    }
+                    fclose(fp);
+                }
+
+                spi.AvailablePages      = freeram / page_size;
+                spi.TotalCommittedPages = (totalram + totalswap - freeram - freeswap) / page_size;
+                spi.TotalCommitLimit    = (totalram + totalswap) / page_size;
+            }
+#endif
+
             if (Length >= len)
             {
                 if (!SystemInformation) ret = STATUS_ACCESS_VIOLATION;
-- 
2.21.0