Implement shared memory support on the PCP platform

Uses the mem.util.shared metric (Shmem from meminfo).

3 files changed, 16 insertions, 14 deletions

diff --git a/pcp/PCPProcessList.c b/pcp/PCPProcessList.c
index a823695e..780862b3 100644
--- a/pcp/PCPProcessList.c
+++ b/pcp/PCPProcessList.c
@@ -1,7 +1,7 @@
 /*
 htop - PCPProcessList.c
 (C) 2014 Hisham H. Muhammad
-(C) 2020 htop dev team
+(C) 2020-2021 htop dev team
 (C) 2020-2021 Red Hat, Inc.  All Rights Reserved.
 Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
@@ -584,12 +584,13 @@ static void PCPProcessList_updateMemoryInfo(ProcessList* super) {
       super->buffersMem = value.ull;
    if (Metric_values(PCP_MEM_SRECLAIM, &value, 1, PM_TYPE_U64) != NULL)
       sreclaimableMem = value.ull;
+   if (Metric_values(PCP_MEM_SHARED, &value, 1, PM_TYPE_U64) != NULL)
+      super->sharedMem = value.ull;
    if (Metric_values(PCP_MEM_CACHED, &value, 1, PM_TYPE_U64) != NULL) {
       super->cachedMem = value.ull;
       super->cachedMem += sreclaimableMem;
    }
-   unsigned long long int usedDiff;
-   usedDiff = freeMem + super->cachedMem + super->buffersMem;
+   const memory_t usedDiff = freeMem + super->cachedMem + sreclaimableMem + super->buffersMem + super->sharedMem;
    super->usedMem = (super->totalMem >= usedDiff) ?
            super->totalMem - usedDiff : super->totalMem - freeMem;
    if (Metric_values(PCP_MEM_AVAILABLE, &value, 1, PM_TYPE_U64) != NULL)
diff --git a/pcp/Platform.c b/pcp/Platform.c
index 91b92673..70af0a85 100644
--- a/pcp/Platform.c
+++ b/pcp/Platform.c
@@ -1,7 +1,7 @@
 /*
 htop - linux/Platform.c
 (C) 2014 Hisham H. Muhammad
-(C) 2020 htop dev team
+(C) 2020-2021 htop dev team
 (C) 2020-2021 Red Hat, Inc.  All Rights Reserved.
 Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
@@ -152,6 +152,7 @@ static const char *Platform_metricNames[] = {
    [PCP_MEM_AVAILABLE] = "mem.util.available",
    [PCP_MEM_BUFFERS] = "mem.util.bufmem",
    [PCP_MEM_CACHED] = "mem.util.cached",
+   [PCP_MEM_SHARED] = "mem.util.shared",
    [PCP_MEM_SRECLAIM] = "mem.util.slabReclaimable",
    [PCP_MEM_SWAPCACHED] = "mem.util.swapCached",
    [PCP_MEM_SWAPTOTAL] = "mem.util.swapTotal",
@@ -587,18 +588,17 @@ double Platform_setCPUValues(Meter* this, int cpu) {
 void Platform_setMemoryValues(Meter* this) {
    const ProcessList* pl = this->pl;
    const PCPProcessList* ppl = (const PCPProcessList*) pl;
-   long int usedMem = pl->usedMem;
-   long int buffersMem = pl->buffersMem;
-   long int cachedMem = pl->cachedMem;
-   usedMem -= buffersMem + cachedMem;
-   this->total = pl->totalMem;
-   this->values[0] = usedMem;
-   this->values[1] = buffersMem;
-   this->values[2] = cachedMem;
+
+   this->total     = pl->totalMem;
+   this->values[0] = pl->usedMem;
+   this->values[1] = pl->buffersMem;
+   this->values[2] = pl->sharedMem;
+   this->values[3] = pl->cachedMem;
+   this->values[4] = pl->availableMem;
 
    if (ppl->zfs.enabled != 0) {
       this->values[0] -= ppl->zfs.size;
-      this->values[2] += ppl->zfs.size;
+      this->values[3] += ppl->zfs.size;
    }
 }
 
diff --git a/pcp/Platform.h b/pcp/Platform.h
index 4d66d888..1661be77 100644
--- a/pcp/Platform.h
+++ b/pcp/Platform.h
@@ -3,7 +3,7 @@
 /*
 htop - pcp/Platform.h
 (C) 2014 Hisham H. Muhammad
-(C) 2020 htop dev team
+(C) 2020-2021 htop dev team
 (C) 2020-2021 Red Hat, Inc.  All Rights Reserved.
 Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
@@ -125,6 +125,7 @@ typedef enum Metric_ {
    PCP_MEM_FREE,		/* mem.util.free */
    PCP_MEM_BUFFERS,		/* mem.util.bufmem */
    PCP_MEM_CACHED,		/* mem.util.cached */
+   PCP_MEM_SHARED,		/* mem.util.shared */
    PCP_MEM_AVAILABLE,		/* mem.util.available */
    PCP_MEM_SRECLAIM,		/* mem.util.slabReclaimable */
    PCP_MEM_SWAPCACHED,		/* mem.util.swapCached */