windows: Use an adaptively sized buffer for nonblocking writes.

[libserialport.git] / libserialport_internal.h

diff --git a/libserialport_internal.h b/libserialport_internal.h
index 55108240be0ab6219884701b9589c9ed24be111f..46c77a8b65446ebf6cbe07ceba4c210051f25ae4 100644 (file)
--- a/libserialport_internal.h
+++ b/libserialport_internal.h
@@ -21,10 +21,11 @@
 #ifndef LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
 #define LIBSERIALPORT_LIBSERIALPORT_INTERNAL_H
 
-#include "config.h"
 
 #ifdef __linux__
-#define _BSD_SOURCE /* For timeradd, timersub, timercmp. */
+/* For timeradd, timersub, timercmp, realpath. */
+#define _BSD_SOURCE 1 /* for glibc < 2.19 */
+#define _DEFAULT_SOURCE 1 /* for glibc >= 2.20 */
 #endif
 
 #include <string.h>
@@ -51,7 +52,6 @@
 #include <termios.h>
 #include <sys/ioctl.h>
 #include <sys/time.h>
-#include <limits.h>
 #include <poll.h>
 #endif
 #ifdef __APPLE__
@@ -69,7 +69,7 @@
 #include "linux_termios.h"
 
 /* TCGETX/TCSETX is not available everywhere. */
-#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
+#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_STRUCT_TERMIOX)
 #define USE_TERMIOX
 #endif
 #endif
@@ -83,7 +83,7 @@
 #endif
 
 /* Non-standard baudrates are not available everywhere. */
-#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && defined(HAVE_BOTHER)
+#if (defined(HAVE_TERMIOS_SPEED) || defined(HAVE_TERMIOS2_SPEED)) && HAVE_DECL_BOTHER
 #define USE_TERMIOS_SPEED
 #endif
 
@@ -107,8 +107,10 @@ struct sp_port {
        OVERLAPPED read_ovl;
        OVERLAPPED wait_ovl;
        DWORD events;
-       BYTE pending_byte;
+       BYTE *write_buf;
+       DWORD write_buf_size;
        BOOL writing;
+       BOOL wait_running;
 #else
        int fd;
 #endif
@@ -186,11 +188,12 @@ extern void (*sp_debug_handler)(const char *format, ...);
 } while (0)
 #define RETURN_CODEVAL(x) do { \
        switch (x) { \
-               case SP_OK: RETURN_CODE(SP_OK); \
-               case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
-               case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
-               case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
-               case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
+       case SP_OK: RETURN_CODE(SP_OK); \
+       case SP_ERR_ARG: RETURN_CODE(SP_ERR_ARG); \
+       case SP_ERR_FAIL: RETURN_CODE(SP_ERR_FAIL); \
+       case SP_ERR_MEM: RETURN_CODE(SP_ERR_MEM); \
+       case SP_ERR_SUPP: RETURN_CODE(SP_ERR_SUPP); \
+       default: RETURN_CODE(SP_ERR_FAIL); \
        } \
 } while (0)
 #define RETURN_OK() RETURN_CODE(SP_OK);
@@ -222,7 +225,7 @@ extern void (*sp_debug_handler)(const char *format, ...);
 #define TRACE(fmt, ...) DEBUG_FMT("%s(" fmt ") called", __func__, __VA_ARGS__)
 #define TRACE_VOID() DEBUG_FMT("%s() called", __func__)
 
-#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
+#define TRY(x) do { int retval = x; if (retval != SP_OK) RETURN_CODEVAL(retval); } while (0)
 
 SP_PRIV struct sp_port **list_append(struct sp_port **list, const char *portname);