Added missing files from the previous commit

libsdl-org · Aug 15, 2017 · e086a1c · e086a1c
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commit e086a1c
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diff --git a/src/core/unix/SDL_poll.c b/src/core/unix/SDL_poll.c
@@ -0,0 +1,88 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#include "SDL_assert.h"
+#include "SDL_poll.h"
+
+#undef HAVE_POLL
+#ifdef HAVE_POLL
+#include <poll.h>
+#else
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+#endif
+#include <errno.h>
+
+
+int
+SDL_IOReady(int fd, SDL_bool forWrite, int timeoutMS)
+{
+    int result;
+
+    /* Note: We don't bother to account for elapsed time if we get EINTR */
+    do
+    {
+#ifdef HAVE_POLL
+        struct pollfd info;
+
+        info.fd = fd;
+        if (forWrite) {
+            info.events = POLLOUT;
+        } else {
+            info.events = POLLIN | POLLPRI;
+        }
+        result = poll(&info, 1, timeoutMS);
+#else
+        fd_set rfdset, *rfdp = NULL;
+        fd_set wfdset, *wfdp = NULL;
+        struct timeval tv, *tvp = NULL;
+
+        /* If this assert triggers we'll corrupt memory here */
+        SDL_assert(fd >= 0 && fd < FD_SETSIZE);
+
+        if (forWrite) {
+            FD_ZERO(&wfdset);
+            FD_SET(fd, &wfdset);
+            wfdp = &wfdset;
+        } else {
+            FD_ZERO(&rfdset);
+            FD_SET(fd, &rfdset);
+            rfdp = &rfdset;
+        }
+
+        if (timeoutMS >= 0) {
+            tv.tv_sec = timeoutMS / 1000;
+            tv.tv_usec = (timeoutMS % 1000) * 1000;
+            tvp = &tv;
+        }
+
+        result = select(fd + 1, rfdp, wfdp, NULL, tvp);
+#endif /* HAVE_POLL */
+
+    } while ( result < 0 && errno == EINTR );
+
+    return result;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
diff --git a/src/core/unix/SDL_poll.h b/src/core/unix/SDL_poll.h
@@ -0,0 +1,34 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2017 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../../SDL_internal.h"
+
+#ifndef SDL_poll_h_
+#define SDL_poll_h_
+
+#include "SDL_stdinc.h"
+
+
+extern int SDL_IOReady(int fd, SDL_bool forWrite, int timeoutMS);
+
+#endif /* SDL_poll_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */