| | |
| | | #include <sys/resource.h> |
| | | #include <sys/syscall.h> |
| | | #include <unistd.h> |
| | | #include <errno.h> |
| | | |
| | | #include "../../core/linux/SDL_dbus.h" |
| | | #endif /* __LINUX__ */ |
| | | |
| | | #if defined(__LINUX__) || defined(__MACOSX__) || defined(__IPHONEOS__) |
| | |
| | | #endif |
| | | #endif |
| | | |
| | | #include "SDL_log.h" |
| | | #include "SDL_platform.h" |
| | | #include "SDL_thread.h" |
| | | #include "../SDL_thread_c.h" |
| | |
| | | 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) |
| | | { |
| | |
| | | return 0; |
| | | #elif __LINUX__ |
| | | int value; |
| | | pid_t thread = syscall(SYS_gettid); |
| | | |
| | | if (priority == SDL_THREAD_PRIORITY_LOW) { |
| | | value = 19; |
| | | } else if (priority == SDL_THREAD_PRIORITY_HIGH) { |
| | | value = -10; |
| | | } else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) { |
| | | value = -20; |
| | | } else { |
| | | value = 0; |
| | | } |
| | | if (setpriority(PRIO_PROCESS, syscall(SYS_gettid), value) < 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> |
| | | */ |
| | | return SDL_SetError("setpriority() failed"); |
| | | } |
| | | return 0; |
| | | return SDL_LinuxSetThreadPriority(thread, value); |
| | | #else |
| | | struct sched_param sched; |
| | | int policy; |
| | |
| | | } |
| | | if (priority == SDL_THREAD_PRIORITY_LOW) { |
| | | sched.sched_priority = sched_get_priority_min(policy); |
| | | } else if (priority == SDL_THREAD_PRIORITY_HIGH) { |
| | | } else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) { |
| | | sched.sched_priority = sched_get_priority_max(policy); |
| | | } else { |
| | | int min_priority = sched_get_priority_min(policy); |
| | | int max_priority = sched_get_priority_max(policy); |
| | | sched.sched_priority = (min_priority + (max_priority - min_priority) / 2); |
| | | if (priority == SDL_THREAD_PRIORITY_HIGH) { |
| | | sched.sched_priority += ((max_priority - min_priority) / 4); |
| | | } |
| | | } |
| | | if (pthread_setschedparam(thread, policy, &sched) != 0) { |
| | | return SDL_SetError("pthread_setschedparam() failed"); |