| | |
| | | /* |
| | | Simple DirectMedia Layer |
| | | Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> |
| | | Copyright (C) 1997-2020 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 |
| | |
| | | */ |
| | | |
| | | #include "../../SDL_internal.h" |
| | | #include "SDL_system.h" |
| | | |
| | | #include <pthread.h> |
| | | |
| | |
| | | |
| | | /* Set caller-requested stack size. Otherwise: use the system default. */ |
| | | if (thread->stacksize) { |
| | | pthread_attr_setstacksize(&type, (size_t) thread->stacksize); |
| | | pthread_attr_setstacksize(&type, thread->stacksize); |
| | | } |
| | | |
| | | /* Create the thread and go! */ |
| | |
| | | return ((SDL_threadID) pthread_self()); |
| | | } |
| | | |
| | | #if __LINUX__ |
| | | /* d-bus queries to org.freedesktop.RealtimeKit1. */ |
| | | #if SDL_USE_LIBDBUS |
| | | |
| | | #define RTKIT_DBUS_NODE "org.freedesktop.RealtimeKit1" |
| | | #define RTKIT_DBUS_PATH "/org/freedesktop/RealtimeKit1" |
| | | #define RTKIT_DBUS_INTERFACE "org.freedesktop.RealtimeKit1" |
| | | |
| | | static pthread_once_t rtkit_initialize_once = PTHREAD_ONCE_INIT; |
| | | static Sint32 rtkit_min_nice_level = -20; |
| | | |
| | | static void |
| | | rtkit_initialize() |
| | | { |
| | | SDL_DBusContext *dbus = SDL_DBus_GetContext(); |
| | | |
| | | /* Try getting minimum nice level: this is often greater than PRIO_MIN (-20). */ |
| | | if (!dbus || !SDL_DBus_QueryPropertyOnConnection(dbus->system_conn, RTKIT_DBUS_NODE, RTKIT_DBUS_PATH, RTKIT_DBUS_INTERFACE, "MinNiceLevel", |
| | | DBUS_TYPE_INT32, &rtkit_min_nice_level)) { |
| | | rtkit_min_nice_level = -20; |
| | | } |
| | | } |
| | | |
| | | static SDL_bool |
| | | rtkit_setpriority(pid_t thread, int nice_level) |
| | | { |
| | | Uint64 ui64 = (Uint64)thread; |
| | | Sint32 si32 = (Sint32)nice_level; |
| | | SDL_DBusContext *dbus = SDL_DBus_GetContext(); |
| | | |
| | | pthread_once(&rtkit_initialize_once, rtkit_initialize); |
| | | |
| | | if (si32 < rtkit_min_nice_level) |
| | | si32 = rtkit_min_nice_level; |
| | | |
| | | if (!dbus || !SDL_DBus_CallMethodOnConnection(dbus->system_conn, |
| | | RTKIT_DBUS_NODE, RTKIT_DBUS_PATH, RTKIT_DBUS_INTERFACE, "MakeThreadHighPriority", |
| | | DBUS_TYPE_UINT64, &ui64, DBUS_TYPE_INT32, &si32, DBUS_TYPE_INVALID, |
| | | DBUS_TYPE_INVALID)) { |
| | | return SDL_FALSE; |
| | | } |
| | | return SDL_TRUE; |
| | | } |
| | | |
| | | #else |
| | | |
| | | static SDL_bool |
| | | rtkit_setpriority(pid_t thread, int nice_level) |
| | | { |
| | | return SDL_FALSE; |
| | | } |
| | | |
| | | #endif /* !SDL_USE_LIBDBUS */ |
| | | |
| | | int |
| | | SDL_LinuxSetThreadPriority(Sint64 threadID, int priority) |
| | | { |
| | | if (setpriority(PRIO_PROCESS, (id_t)threadID, priority) < 0) { |
| | | /* Note that this fails if you're trying to set high priority |
| | | and you don't have root permission. BUT DON'T RUN AS ROOT! |
| | | |
| | | You can grant the ability to increase thread priority by |
| | | running the following command on your application binary: |
| | | sudo setcap 'cap_sys_nice=eip' <application> |
| | | |
| | | Let's try setting priority with RealtimeKit... |
| | | |
| | | README and sample code at: |
| | | http://git.0pointer.net/rtkit.git |
| | | */ |
| | | if (rtkit_setpriority((pid_t)threadID, priority) == SDL_FALSE) { |
| | | return SDL_SetError("setpriority() failed"); |
| | | } |
| | | } |
| | | return 0; |
| | | } |
| | | #endif /* __LINUX__ */ |
| | | |
| | | int |
| | | SDL_SYS_SetThreadPriority(SDL_ThreadPriority priority) |
| | | { |
| | | #if __NACL__ |
| | | #if __NACL__ || __RISCOS__ |
| | | /* FIXME: Setting thread priority does not seem to be supported in NACL */ |
| | | return 0; |
| | | #elif __LINUX__ |