ssl_poll_perf: address compiler warnings

The changes address the following compiler warnings (reported by GCC 14):

    ssl_poll_perf.c: In function ‘srvapp_setup_response’:
    ssl_poll_perf.c:1553:33: warning: variable ‘pesb’ set but not used [-Wunused-but-set-variable]
     1553 |     struct poll_event_sbstream *pesb;
          |                                 ^~~~
    ssl_poll_perf.c: In function ‘clntapp_write_custreamcb’:
    ssl_poll_perf.c:2389:28: warning: unused variable ‘rb’ [-Wunused-variable]
     2389 |     struct request_buffer *rb;
          |                            ^~
    ssl_poll_perf.c: In function ‘clntapp_update_pec’:
    ssl_poll_perf.c:2469:9: warning: variable ‘e’ set but not used [-Wunused-but-set-variable]
     2469 |     int e;
          |         ^
    ssl_poll_perf.c: In function ‘main’:
    ssl_poll_perf.c:3138:9: warning: unused variable ‘ccount’ [-Wunused-variable]
     3138 |     int ccount = 0;
          |         ^~~~~~
    ssl_poll_perf.c: At top level:
    ssl_poll_perf.c:1007:1: warning: ‘stream_state_str’ defined but not used [-Wunused-function]
     1007 | stream_state_str(int stream_state)
          | ^~~~~~~~~~~~~~~~
    ssl_poll_perf.c:954:1: warning: ‘err_str_n’ defined but not used [-Wunused-function]
      954 | err_str_n(unsigned long e, char *buf, size_t buf_sz)
          | ^~~~~~~~~

Complements: openssl#64
Signed-off-by: Eugene Syromiatnikov <[email protected]>

Author: esyr

source/ssl_poll_perf.c

@@ -43,6 +43,7 @@
 #endif
 
 #include <openssl/bio.h>
+#include <openssl/e_os2.h>
 #include <openssl/ssl.h>
 #include <openssl/err.h>
 #include <openssl/quic.h>
@@ -72,15 +73,21 @@
  * then the server sends 64kB of data in HTTP/1.0 response.
  */
 
+static ossl_inline void
+debug_printf(FILE * const f, const char * const fmt, ...)
+{
 #ifdef DEBUG
-# define DPRINTF fprintf
-# define DPRINTFC fprintf
-# define DPRINTFS fprintf
-#else
-# define DPRINTF(...) (void)(0)
-# define DPRINTFC(...) (void)(0)
-# define DPRINTFS(...) (void)(0)
+    va_list ap;
+
+    va_start(ap, fmt);
+    vfprintf(f, fmt, ap);
+    va_end(ap);
 #endif
+}
+
+#define DPRINTF debug_printf
+#define DPRINTFC debug_printf
+#define DPRINTFS debug_printf
 
 /*
  * format string so we can print SSL_poll() events in more informative
@@ -962,9 +969,7 @@ handle_ssl_error(struct poll_event *pe, int rc, const char *caller)
 {
     SSL *ssl = get_ssl_from_pe(pe);
     int ssl_error, rv;
-#ifdef DEBUG
     char err_str[120];
-#endif
 
     /* may be we should use SSL_shutdown_ex() to signal peer what's going on */
     ssl_error = SSL_get_error(ssl, rc);
@@ -2386,7 +2391,6 @@ clntapp_write_cstreamcb(struct poll_event *pe)
 static int
 clntapp_write_custreamcb(struct poll_event *pe)
 {
-    struct request_buffer *rb;
     struct poll_event_custream *pecsu = pecsu = pe_to_custream(pe);
 
     if (pecsu == NULL) {
@@ -3135,7 +3139,6 @@ main(int argc, char *argv[])
         server_thread,
         0
     };
-    int ccount = 0;
     const char *ccountstr = "10";
     const char *bstreamstr = "10";
     const char *ustreamstr = "10";