X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Futil.c;h=8d54049754c0495b2d4394483c9d2825fcc84f73;hb=39c2a6f19301c0042142149fdaa34a5f8cf71c0e;hp=b533b26dafc543a50abba861ef07c9f89c8cde9b;hpb=911a4828e054a531be961cea34de89b666bda710;p=elogind.git

diff --git a/src/util.c b/src/util.c
index b533b26da..8d5404975 100644
--- a/src/util.c
+++ b/src/util.c
@@ -73,7 +73,7 @@ size_t page_size(void) {
         static __thread size_t pgsz = 0;
         long r;
 
-        if (pgsz)
+        if (_likely_(pgsz))
                 return pgsz;
 
         assert_se((r = sysconf(_SC_PAGESIZE)) > 0);
@@ -809,7 +809,7 @@ int parse_env_file(
                 const char *separator, ...) {
 
         int r = 0;
-        char *contents, *p;
+        char *contents = NULL, *p;
 
         assert(fname);
         assert(separator);
@@ -1266,8 +1266,6 @@ bool is_path(const char *p) {
 }
 
 char *path_make_absolute(const char *p, const char *prefix) {
-        char *r;
-
         assert(p);
 
         /* Makes every item in the list an absolute path by prepending
@@ -1276,10 +1274,7 @@ char *path_make_absolute(const char *p, const char *prefix) {
         if (path_is_absolute(p) || !prefix)
                 return strdup(p);
 
-        if (asprintf(&r, "%s/%s", prefix, p) < 0)
-                return NULL;
-
-        return r;
+        return join(prefix, "/", p, NULL);
 }
 
 char *path_make_absolute_cwd(const char *p) {
@@ -3773,7 +3768,7 @@ int columns(void) {
         static __thread int parsed_columns = 0;
         const char *e;
 
-        if (parsed_columns > 0)
+        if (_likely_(parsed_columns > 0))
                 return parsed_columns;
 
         if ((e = getenv("COLUMNS")))
@@ -4369,7 +4364,7 @@ int detect_virtualization(const char **id) {
         const char *_id;
         int r;
 
-        if (cached_id) {
+        if (_likely_(cached_id)) {
 
                 if (cached_id == (const char*) -1)
                         return 0;
@@ -5541,6 +5536,15 @@ char *join(const char *x, ...) {
         return r;
 }
 
+bool is_main_thread(void) {
+        static __thread int cached = 0;
+
+        if (_unlikely_(cached == 0))
+                cached = getpid() == gettid() ? 1 : -1;
+
+        return cached > 0;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",