diff options
Diffstat (limited to 'firmware/target/hosted/sdl/filesystem-sdl.c')
-rw-r--r-- | firmware/target/hosted/sdl/filesystem-sdl.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/firmware/target/hosted/sdl/filesystem-sdl.c b/firmware/target/hosted/sdl/filesystem-sdl.c new file mode 100644 index 0000000000..5a8e2c417a --- /dev/null +++ b/firmware/target/hosted/sdl/filesystem-sdl.c @@ -0,0 +1,55 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2014 by Michael Sevakis + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ +#define RB_FILESYSTEM_OS +#include "config.h" +#include "system.h" +#include "thread-sdl.h" +#include "mutex.h" +#include "file.h" + +#ifdef HAVE_SDL_THREADS +#define YIELD_THRESHOLD 512 +static bool initialized = false; +static struct mutex readwrite_mtx; + +/* Allow other threads to run while performing I/O */ +ssize_t os_sdl_readwrite(int osfd, void *buf, size_t nbyte, bool dowrite) +{ + if (!initialized) + { + mutex_init(&readwrite_mtx); + initialized = true; + } + + mutex_lock(&readwrite_mtx); + + void *mythread = nbyte > YIELD_THRESHOLD ? sim_thread_unlock() : NULL; + + ssize_t rc = dowrite ? write(osfd, buf, nbyte) : read(osfd, buf, nbyte); + + if (mythread) + sim_thread_lock(mythread); + + mutex_unlock(&readwrite_mtx); + return rc; +} + +#endif /* HAVE_SDL_THREADS */ |