Introduce Machine class for host-specific info (split from ProcessList)

First stage in sanitizing the process list structure so that htop
can support other types of lists too (cgroups, filesystems, ...),
in the not-too-distant future.

This introduces struct Machine for system-wide information while
keeping process-list information in ProcessList (now much less).
Next step is to propogate this separation into each platform, to
match these core changes.

1 files changed, 60 insertions, 0 deletions

diff --git a/Machine.c b/Machine.c
new file mode 100644
index 00000000..63a996ef
--- /dev/null
+++ b/Machine.c
@@ -0,0 +1,60 @@
+/*
+htop - Machine.c
+(C) 2023 Red Hat, Inc.
+(C) 2004,2005 Hisham H. Muhammad
+Released under the GNU GPLv2+, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Machine.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "CRT.h"
+#include "Hashtable.h"
+#include "Macros.h"
+#include "Platform.h"
+#include "XUtils.h"
+
+
+void Machine_init(Machine* this, UsersTable* usersTable, uid_t userId) {
+   this->usersTable = usersTable;
+   this->userId = userId;
+
+   // always maintain valid realtime timestamps
+   Platform_gettime_realtime(&this->realtime, &this->realtimeMs);
+
+#ifdef HAVE_LIBHWLOC
+   this->topologyOk = false;
+   if (hwloc_topology_init(&this->topology) == 0) {
+      this->topologyOk =
+         #if HWLOC_API_VERSION < 0x00020000
+         /* try to ignore the top-level machine object type */
+         0 == hwloc_topology_ignore_type_keep_structure(this->topology, HWLOC_OBJ_MACHINE) &&
+         /* ignore caches, which don't add structure */
+         0 == hwloc_topology_ignore_type_keep_structure(this->topology, HWLOC_OBJ_CORE) &&
+         0 == hwloc_topology_ignore_type_keep_structure(this->topology, HWLOC_OBJ_CACHE) &&
+         0 == hwloc_topology_set_flags(this->topology, HWLOC_TOPOLOGY_FLAG_WHOLE_SYSTEM) &&
+         #else
+         0 == hwloc_topology_set_all_types_filter(this->topology, HWLOC_TYPE_FILTER_KEEP_STRUCTURE) &&
+         #endif
+         0 == hwloc_topology_load(this->topology);
+   }
+#endif
+}
+
+void Machine_done(Machine* this) {
+#ifdef HAVE_LIBHWLOC
+   if (this->topologyOk) {
+      hwloc_topology_destroy(this->topology);
+   }
+#else
+   (void)this;
+#endif
+}
+
+void Machine_addList(Machine* this, struct ProcessList_ *pl) {
+   // currently only process lists are supported
+   this->pl = pl;
+}