From 42032749e61076b3d9e5004432073c2a5ea737ce Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Tue, 28 May 2019 21:28:31 +0200
Subject: [PATCH] Move cpus_in_affinity_mask() to cpu-set-util.[ch]

It just seems to fit better there and it's always better to have things
in shared/ rather than basic/.

(cherry picked from commit f44b3035d4a698aa0ce08a552199b54d43de3d85)

Related: #1734787
---
 src/basic/cpu-set-util.c  | 34 ++++++++++++++++++++++++++++++++++
 src/basic/cpu-set-util.h  |  2 ++
 src/basic/process-util.c  |  5 ++---
 src/shared/condition.c    |  1 +
 src/test/test-condition.c |  1 +
 5 files changed, 40 insertions(+), 3 deletions(-)

diff --git a/src/basic/cpu-set-util.c b/src/basic/cpu-set-util.c
index fe440f6381..1803539ac6 100644
--- a/src/basic/cpu-set-util.c
+++ b/src/basic/cpu-set-util.c
@@ -204,3 +204,37 @@ int parse_cpu_set_extend(
 
         return cpu_set_add_all(old, &cpuset);
 }
+
+int cpus_in_affinity_mask(void) {
+        size_t n = 16;
+        int r;
+
+        for (;;) {
+                cpu_set_t *c;
+
+                c = CPU_ALLOC(n);
+                if (!c)
+                        return -ENOMEM;
+
+                if (sched_getaffinity(0, CPU_ALLOC_SIZE(n), c) >= 0) {
+                        int k;
+
+                        k = CPU_COUNT_S(CPU_ALLOC_SIZE(n), c);
+                        CPU_FREE(c);
+
+                        if (k <= 0)
+                                return -EINVAL;
+
+                        return k;
+                }
+
+                r = -errno;
+                CPU_FREE(c);
+
+                if (r != -EINVAL)
+                        return r;
+                if (n > SIZE_MAX/2)
+                        return -ENOMEM;
+                n *= 2;
+        }
+}
diff --git a/src/basic/cpu-set-util.h b/src/basic/cpu-set-util.h
index eb31b362fe..9b026aca09 100644
--- a/src/basic/cpu-set-util.h
+++ b/src/basic/cpu-set-util.h
@@ -49,3 +49,5 @@ int parse_cpu_set_extend(
 static inline int parse_cpu_set(const char *rvalue, CPUSet *cpu_set){
         return parse_cpu_set_full(rvalue, cpu_set, false, NULL, NULL, 0, NULL);
 }
+
+int cpus_in_affinity_mask(void);
diff --git a/src/basic/process-util.c b/src/basic/process-util.c
index 6dbeee9dda..0a4a747ba4 100644
--- a/src/basic/process-util.c
+++ b/src/basic/process-util.c
@@ -4,7 +4,6 @@
 #include <errno.h>
 #include <limits.h>
 #include <linux/oom.h>
-#include <sched.h>
 #include <signal.h>
 #include <stdbool.h>
 #include <stdio.h>
@@ -1474,7 +1473,7 @@ static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",
         [IOPRIO_CLASS_BE] = "best-effort",
-        [IOPRIO_CLASS_IDLE] = "idle"
+        [IOPRIO_CLASS_IDLE] = "idle",
 };
 
 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(ioprio_class, int, IOPRIO_N_CLASSES);
@@ -1495,7 +1494,7 @@ static const char* const sched_policy_table[] = {
         [SCHED_BATCH] = "batch",
         [SCHED_IDLE] = "idle",
         [SCHED_FIFO] = "fifo",
-        [SCHED_RR] = "rr"
+        [SCHED_RR] = "rr",
 };
 
 DEFINE_STRING_TABLE_LOOKUP_WITH_FALLBACK(sched_policy, int, INT_MAX);
diff --git a/src/shared/condition.c b/src/shared/condition.c
index 2969a89b4e..b829f0528c 100644
--- a/src/shared/condition.c
+++ b/src/shared/condition.c
@@ -21,6 +21,7 @@
 #include "cap-list.h"
 #include "cgroup-util.h"
 #include "condition.h"
+#include "cpu-set-util.h"
 #include "efivars.h"
 #include "extract-word.h"
 #include "fd-util.h"
diff --git a/src/test/test-condition.c b/src/test/test-condition.c
index 7ce6ee80ea..24395dafc6 100644
--- a/src/test/test-condition.c
+++ b/src/test/test-condition.c
@@ -13,6 +13,7 @@
 #include "audit-util.h"
 #include "cgroup-util.h"
 #include "condition.h"
+#include "cpu-set-util.h"
 #include "efivars.h"
 #include "hostname-util.h"
 #include "id128-util.h"