From 71635f2c1c41a3c3273cd07fda340efa4941625f Mon Sep 17 00:00:00 2001
From: Doug MacEachern <dougm@hyperic.com>
Date: Fri, 21 Dec 2007 22:42:31 +0000
Subject: [PATCH] Add sigar_proc_list_t to sigar_t for internal re-use

---
 include/sigar_private.h |  1 +
 src/sigar.c             | 21 ++++++++++++++++++++-
 2 files changed, 21 insertions(+), 1 deletion(-)

diff --git a/include/sigar_private.h b/include/sigar_private.h
index dd2b0c36..41d0c7df 100644
--- a/include/sigar_private.h
+++ b/include/sigar_private.h
@@ -63,6 +63,7 @@
    char *ifconf_buf; \
    int ifconf_len; \
    char *self_path; \
+   sigar_proc_list_t *pids; \
    sigar_cache_t *fsdev; \
    sigar_cache_t *proc_cpu; \
    sigar_cache_t *net_listen; \
diff --git a/src/sigar.c b/src/sigar.c
index a1a549e6..265519df 100644
--- a/src/sigar.c
+++ b/src/sigar.c
@@ -51,6 +51,7 @@ SIGAR_DECLARE(int) sigar_open(sigar_t **sigar)
         (*sigar)->ptql_re_data = NULL;
         (*sigar)->self_path = NULL;
         (*sigar)->fsdev = NULL;
+        (*sigar)->pids = NULL;
         (*sigar)->proc_cpu = NULL;
         (*sigar)->net_listen = NULL;
         (*sigar)->net_services_tcp = NULL;
@@ -68,6 +69,10 @@ SIGAR_DECLARE(int) sigar_close(sigar_t *sigar)
     if (sigar->self_path) {
         free(sigar->self_path);
     }
+    if (sigar->pids) {
+        sigar_proc_list_destroy(sigar, sigar->pids);
+        free(sigar->pids);
+    }
     if (sigar->fsdev) {
         sigar_cache_destroy(sigar->fsdev);
     }
@@ -304,7 +309,21 @@ SIGAR_DECLARE(int) sigar_proc_list_destroy(sigar_t *sigar,
 SIGAR_DECLARE(int) sigar_proc_list_get(sigar_t *sigar,
                                        sigar_proc_list_t *proclist)
 {
-    sigar_proc_list_create(proclist);
+    if (proclist == NULL) {
+        /* internal re-use */
+        if (sigar->pids == NULL) {
+            sigar->pids = malloc(sizeof(*sigar->pids));
+            sigar_proc_list_create(sigar->pids);
+        }
+        else {
+            sigar->pids->number = 0;
+        }
+        proclist = sigar->pids;
+    }
+    else {
+        sigar_proc_list_create(proclist);
+    }
+
     return sigar_os_proc_list_get(sigar, proclist);
 }