Merge commit '4dd5b3d9' into thread-next

diff --cc lib/birdlib.h
index 57149cc9369533f076fc85a21d0ec4c6a4252cd0,4fea3f9f0c30a0e27f7fa8e742e37213405fb228..41aa8b3f05ca2f610cfc1230115b7a7a47c7da1e
--- 1/lib/birdlib.h
--- 2/lib/birdlib.h
+++ b/lib/birdlib.h
@@@ -9,50 -9,17 +9,52 @@@
  #ifndef _BIRD_BIRDLIB_H_
  #define _BIRD_BIRDLIB_H_
  
 +#include <stddef.h>
 +#include <setjmp.h>
 +
 +#include "sysdep/config.h"
  #include "lib/alloca.h"
 +#include "lib/macro.h"
 +
+ #include <stdarg.h>
+ 
  /* Ugly structure offset handling macros */
  
 -struct align_probe { char x; long int y; };
 +#define SAME_TYPE(a, b)       ({ int _ = ((a) != (b)); !_; })
 +#define TYPE_CAST(from, to, what) ( SAME_TYPE(((from) NULL), (what)), ((to) (what)))
  
 +#ifdef offsetof
 +#define OFFSETOF offsetof
 +#else
  #define OFFSETOF(s, i) ((size_t) &((s *)0)->i)
 -#define SKIP_BACK(s, i, p) ((s *)((char *)p - OFFSETOF(s, i)))
 +#endif
 +
 +#define SKIP_BACK(s, i, p) ({ \
 +    typeof(p) _orig = p; \
 +    s *_ptr = ((s *)((char *)_orig - OFFSETOF(s, i))); \
 +    SAME_TYPE(&_ptr->i, _orig); \
 +    _ptr; })
 +#define SKIP_BACK_DECLARE(s, n, i, p) s *n = SKIP_BACK(s, i, p)
  #define BIRD_ALIGN(s, a) (((s)+a-1)&~(a-1))
 -#define CPU_STRUCT_ALIGN (sizeof(struct align_probe))
 +#define BIRD_SET_ALIGNED_POINTER(ptr, val)  do { \
 +  size_t _alignment = _Alignof(typeof(*ptr)); \
 +  ptr = (typeof(ptr)) BIRD_ALIGN((uintptr_t)(val), _alignment); \
 +} while (0)
 +#define CPU_STRUCT_ALIGN  (MAX_(_Alignof(void*), _Alignof(u64)))
 +#define BIRD_CPU_ALIGN(s) BIRD_ALIGN((s), CPU_STRUCT_ALIGN)
 +
 +/* Structure item alignment macros */
 +
 +#define PADDING_NAME(id)      _padding_##id
 +#define PADDING_(id, sz)      u8 PADDING_NAME(id)[sz]
 +
 +#if CPU_POINTER_ALIGNMENT == 4
 +#define PADDING(id, n32, n64) PADDING_(id, n32)
 +#elif CPU_POINTER_ALIGNMENT == 8
 +#define PADDING(id, n32, n64) PADDING_(id, n64)
 +#else
 +#error "Strange CPU pointer alignment: " CPU_POINTER_ALIGNMENT
 +#endif
  
  /* Utility macros */
  

diff --cc sysdep/unix/log.c
index 9d77211bf059705f42020d729dfd308c21b9f70a,6c7cac54076d74ddce9f8d377a505348f3dceb70..384da303d79626af24213733c8ca84c86f0ff9bf
--- 1/sysdep/unix/log.c
--- 2/sysdep/unix/log.c
+++ b/sysdep/unix/log.c
@@@ -282,73 -274,13 +282,73 @@@ log_commit(log_buffer *buf
  
  int buffer_vprint(buffer *buf, const char *fmt, va_list args);
  
- static void
 +void
 +log_prepare(log_buffer *buf, int class)
 +{
 +  buf->class = class;
 +
 +  buf->buf.start = buf->buf.pos = buf->block;
 +  buf->buf.end = buf->block + sizeof buf->block;
 +
 +  int lf = atomic_load_explicit(&logging_flags, memory_order_acquire);
 +
 +  buf->pos[LBP_TIMESTAMP] = buf->buf.pos;
 +  if (BIT32_TEST(&lf, LBP_TIMESTAMP))
 +  {
 +    rcu_read_lock();
 +    const char *fmt = atomic_load_explicit(&global_runtime, memory_order_acquire)->tf_log.fmt1;
 +    int t = tm_format_real_time(buf->buf.pos, buf->buf.end - buf->buf.pos, fmt, current_real_time());
 +    rcu_read_unlock();
 +    if (t)
 +      buf->buf.pos += t;
 +    else
 +      buffer_puts(&buf->buf, "<time format error>");
 +
 +    *(buf->buf.pos++) = ' ';
 +  }
 +
 +  buf->pos[LBP_UDP_HEADER] = buf->buf.pos;
 +  if (BIT32_TEST(&lf, LBP_UDP_HEADER))
 +  {
 +    /* Legacy RFC 3164 format, but with us precision */
 +    buffer_print(&buf->buf, "<%d>", LOG_DAEMON | syslog_priorities[class]);
 +
 +    const char *fmt = "%b %d %T.%6f";
 +    int t = tm_format_real_time(buf->buf.pos, buf->buf.end - buf->buf.pos, fmt, current_real_time());
 +    if (t)
 +      buf->buf.pos += t;
 +    else
 +      buffer_puts(&buf->buf, "<time format error>");
 +
 +    rcu_read_lock();
 +    const char *hostname = atomic_load_explicit(&global_runtime, memory_order_acquire)->hostname ?: "<none>";
 +    buffer_print(&buf->buf, " %s %s: ", hostname, bird_name);
 +    rcu_read_unlock();
 +  }
 +
 +  buf->pos[LBP_THREAD_ID] = buf->buf.pos;
 +  if (BIT32_TEST(&lf, LBP_THREAD_ID))
 +    buffer_print(&buf->buf, "[%04x] ", THIS_THREAD_ID);
 +
 +  buf->pos[LBP_CLASS] = buf->buf.pos;
 +  if (BIT32_TEST(&lf, LBP_CLASS))
 +    buffer_print(&buf->buf, "<%s> ", class_names[class]);
 +
 +  buf->pos[LBP_MSG] = buf->buf.pos;
 +}
 +
+ void
  vlog(int class, const char *msg, va_list args)
  {
 -  buffer buf;
 -  LOG_BUFFER_INIT(buf);
 -  buffer_vprint(&buf, msg, args);
 -  log_commit(class, &buf);
 +  static _Thread_local log_buffer buf;
 +
 +  /* No logging at all if nobody would receive the message either */
 +  if (!(atomic_load_explicit(&logging_mask, memory_order_acquire) & (1 << class)))
 +    return;
 +
 +  log_prepare(&buf, class);
 +  buffer_vprint(&buf.buf, msg, args);
 +  log_commit(&buf);
  }