[hackers] [sxiv] Compiler independent buffer alignment || Bert Münnich

[git]

commit de3d7827ce13a52b1bcf3b72e9dc2ee89152dea6
Author:     Bert Münnich <be...@posteo.de>
AuthorDate: Wed May 17 20:15:35 2017 +0200
Commit:     Bert Münnich <be...@posteo.de>
CommitDate: Wed May 17 20:15:35 2017 +0200

    Compiler independent buffer alignment

diff --git a/autoreload_inotify.c b/autoreload_inotify.c
index a7378f6..473b8cb 100644
--- a/autoreload_inotify.c
+++ b/autoreload_inotify.c
@@ -56,22 +56,26 @@ static void arl_setup_dir(arl_t *arl, const char *filepath)
        free(dntmp);
 }
 
+union {
+       char d[4096]; /* aligned buffer */
+       struct inotify_event e;
+} buf;
+
 bool arl_handle(arl_t *arl, const char *filepath)
 {
        bool reload = false;
-       char buf[4096] __attribute__ ((aligned(__alignof__(struct 
inotify_event))));
        char *ptr;
        const struct inotify_event *event;
 
        for (;;) {
-               ssize_t len = read(arl->fd, buf, sizeof(buf));
+               ssize_t len = read(arl->fd, buf.d, sizeof(buf.d));
 
                if (len == -1) {
                        if (errno == EINTR)
                                continue;
                        break;
                }
-               for (ptr = buf; ptr < buf + len; ptr += sizeof(*event) + 
event->len) {
+               for (ptr = buf.d; ptr < buf.d + len; ptr += sizeof(*event) + 
event->len) {
                        event = (const struct inotify_event*) ptr;
 
                        /* events from watching the file itself */