SDL  2.0
SDL_systhread.cpp File Reference
#include "../../SDL_internal.h"
#include "SDL_thread.h"
#include "../SDL_thread_c.h"
#include "../SDL_systhread.h"
#include "SDL_log.h"
#include <mutex>
#include <thread>
#include <system_error>
+ Include dependency graph for SDL_systhread.cpp:

Go to the source code of this file.

Functions

static void RunThread (void *args)
 
int SDL_SYS_CreateThread (SDL_Thread *thread, void *args)
 
void SDL_SYS_SetupThread (const char *name)
 
SDL_threadID SDL_ThreadID (void)
 
int SDL_SYS_SetThreadPriority (SDL_ThreadPriority priority)
 
void SDL_SYS_WaitThread (SDL_Thread *thread)
 
void SDL_SYS_DetachThread (SDL_Thread *thread)
 
SDL_TLSDataSDL_SYS_GetTLSData (void)
 
int SDL_SYS_SetTLSData (SDL_TLSData *data)
 

Function Documentation

◆ RunThread()

static void RunThread ( void args)
static

Definition at line 41 of file SDL_systhread.cpp.

42 {
43  SDL_RunThread(args);
44 }

References SDL_RunThread().

Referenced by SDL_SYS_CreateThread().

◆ SDL_SYS_CreateThread()

int SDL_SYS_CreateThread ( SDL_Thread thread,
void args 
)

Definition at line 48 of file SDL_systhread.cpp.

49 {
50  try {
51  // !!! FIXME: no way to set a thread stack size here.
52  std::thread cpp_thread(RunThread, args);
53  thread->handle = (void *) new std::thread(std::move(cpp_thread));
54  return 0;
55  } catch (std::system_error & ex) {
56  SDL_SetError("unable to start a C++ thread: code=%d; %s", ex.code(), ex.what());
57  return -1;
58  } catch (std::bad_alloc &) {
60  return -1;
61  }
62 }

References SDL_Thread::handle, RunThread(), SDL_OutOfMemory, and SDL_SetError.

◆ SDL_SYS_DetachThread()

void SDL_SYS_DetachThread ( SDL_Thread thread)

Definition at line 147 of file SDL_systhread.cpp.

148 {
149  if ( ! thread) {
150  return;
151  }
152 
153  try {
154  std::thread * cpp_thread = (std::thread *) thread->handle;
155  if (cpp_thread->joinable()) {
156  cpp_thread->detach();
157  }
158  } catch (std::system_error &) {
159  // An error occurred when detaching the thread. SDL_DetachThread does not,
160  // however, seem to provide a means to report errors to its callers
161  // though!
162  }
163 }

References SDL_Thread::handle, and if.

◆ SDL_SYS_GetTLSData()

SDL_TLSData* SDL_SYS_GetTLSData ( void  )

Definition at line 167 of file SDL_systhread.cpp.

168 {
169  return SDL_Generic_GetTLSData();
170 }

References SDL_Generic_GetTLSData().

◆ SDL_SYS_SetThreadPriority()

int SDL_SYS_SetThreadPriority ( SDL_ThreadPriority  priority)

Definition at line 97 of file SDL_systhread.cpp.

98 {
99 #ifdef __WINRT__
100  int value;
101 
102  if (priority == SDL_THREAD_PRIORITY_LOW) {
103  value = THREAD_PRIORITY_LOWEST;
104  }
105  else if (priority == SDL_THREAD_PRIORITY_HIGH) {
106  value = THREAD_PRIORITY_HIGHEST;
107  }
108  else if (priority == SDL_THREAD_PRIORITY_TIME_CRITICAL) {
109  // FIXME: WinRT does not support TIME_CRITICAL! -flibit
110  SDL_LogWarn(SDL_LOG_CATEGORY_SYSTEM, "TIME_CRITICAL unsupported, falling back to HIGHEST");
111  value = THREAD_PRIORITY_HIGHEST;
112  }
113  else {
114  value = THREAD_PRIORITY_NORMAL;
115  }
116  if (!SetThreadPriority(GetCurrentThread(), value)) {
117  return WIN_SetError("SetThreadPriority()");
118  }
119  return 0;
120 #else
121  return SDL_Unsupported();
122 #endif
123 }

References SDL_LOG_CATEGORY_SYSTEM, SDL_LogWarn, SDL_THREAD_PRIORITY_HIGH, SDL_THREAD_PRIORITY_LOW, SDL_THREAD_PRIORITY_TIME_CRITICAL, SDL_Unsupported, and WIN_SetError().

◆ SDL_SYS_SetTLSData()

int SDL_SYS_SetTLSData ( SDL_TLSData data)

Definition at line 174 of file SDL_systhread.cpp.

175 {
177 }

References SDL_Generic_SetTLSData().

◆ SDL_SYS_SetupThread()

void SDL_SYS_SetupThread ( const char *  name)

Definition at line 66 of file SDL_systhread.cpp.

67 {
68  // Make sure a thread ID gets assigned ASAP, for debugging purposes:
69  SDL_ThreadID();
70  return;
71 }

References SDL_ThreadID().

◆ SDL_SYS_WaitThread()

void SDL_SYS_WaitThread ( SDL_Thread thread)

Definition at line 127 of file SDL_systhread.cpp.

128 {
129  if ( ! thread) {
130  return;
131  }
132 
133  try {
134  std::thread * cpp_thread = (std::thread *) thread->handle;
135  if (cpp_thread->joinable()) {
136  cpp_thread->join();
137  }
138  } catch (std::system_error &) {
139  // An error occurred when joining the thread. SDL_WaitThread does not,
140  // however, seem to provide a means to report errors to its callers
141  // though!
142  }
143 }

References SDL_Thread::handle, and if.

◆ SDL_ThreadID()

SDL_threadID SDL_ThreadID ( void  )

Get the thread identifier for the current thread.

Definition at line 75 of file SDL_systhread.cpp.

76 {
77 #ifdef __WINRT__
78  return GetCurrentThreadId();
79 #else
80  // HACK: Mimick a thread ID, if one isn't otherwise available.
81  static thread_local SDL_threadID current_thread_id = 0;
82  static SDL_threadID next_thread_id = 1;
83  static std::mutex next_thread_id_mutex;
84 
85  if (current_thread_id == 0) {
86  std::lock_guard<std::mutex> lock(next_thread_id_mutex);
87  current_thread_id = next_thread_id;
88  ++next_thread_id;
89  }
90 
91  return current_thread_id;
92 #endif
93 }

References lock, and mutex.

Referenced by SDL_SYS_SetupThread().

SDL_ThreadID
SDL_threadID SDL_ThreadID(void)
Definition: SDL_systhread.cpp:75
SDL_Generic_SetTLSData
int SDL_Generic_SetTLSData(SDL_TLSData *storage)
Definition: SDL_thread.c:163
if
set set set set set set set macro pixldst1 abits if abits op else op endif endm macro pixldst2 abits if abits op else op endif endm macro pixldst4 abits if abits op else op endif endm macro pixldst0 abits op endm macro pixldst3 mem_operand op endm macro pixldst30 mem_operand op endm macro pixldst abits if abits elseif abits elseif abits elseif abits elseif abits pixldst0 abits else pixldst0 abits pixldst0 abits pixldst0 abits pixldst0 abits endif elseif abits else pixldst0 abits pixldst0 abits endif elseif abits else error unsupported bpp *numpix else pixst endif endm macro pixld1_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl mov asr adds SRC_WIDTH_FIXED bpl add asl else error unsupported endif endm macro pixld2_s mem_operand if mov asr add asl add asl mov asr sub UNIT_X add asl mov asr add asl add asl mov asr add UNIT_X add asl else pixld1_s mem_operand pixld1_s mem_operand endif endm macro pixld0_s mem_operand if asr adds SRC_WIDTH_FIXED bpl add asl elseif asr adds SRC_WIDTH_FIXED bpl add asl endif endm macro pixld_s_internal mem_operand if mem_operand pixld2_s mem_operand pixdeinterleave basereg elseif mem_operand elseif mem_operand elseif mem_operand elseif mem_operand pixld0_s mem_operand else pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else pixld0_s mem_operand pixld0_s mem_operand endif elseif mem_operand else error unsupported mem_operand if bpp mem_operand endif endm macro vuzp8 reg2 vuzp d d &reg2 endm macro vzip8 reg2 vzip d d &reg2 endm macro pixdeinterleave basereg basereg basereg basereg basereg endif endm macro pixinterleave basereg basereg basereg basereg basereg endif endm macro PF boost_increment endif if endif PF tst PF addne PF subne PF cmp ORIG_W if endif if endif if endif PF subge ORIG_W PF subges if endif if endif if endif endif endm macro cache_preload_simple endif if dst_r_bpp pld[DST_R, #(PREFETCH_DISTANCE_SIMPLE *dst_r_bpp/8)] endif if mask_bpp pld if[MASK, #(PREFETCH_DISTANCE_SIMPLE *mask_bpp/8)] endif endif endm macro fetch_mask_pixblock pixld mask_basereg pixblock_size MASK endm macro ensure_destination_ptr_alignment process_pixblock_tail_head if beq irp skip1(dst_w_bpp<=(lowbit *8)) &&((lowbit *8)<(pixblock_size *dst_w_bpp)) .if lowbit< 16 tst DST_R
Definition: pixman-arm-neon-asm.h:469
SDL_RunThread
void SDL_RunThread(void *data)
Definition: SDL_thread.c:271
SDL_THREAD_PRIORITY_TIME_CRITICAL
@ SDL_THREAD_PRIORITY_TIME_CRITICAL
Definition: SDL_thread.h:63
mutex
static SDL_mutex * mutex
Definition: testlock.c:23
SDL_THREAD_PRIORITY_HIGH
@ SDL_THREAD_PRIORITY_HIGH
Definition: SDL_thread.h:62
SDL_THREAD_PRIORITY_LOW
@ SDL_THREAD_PRIORITY_LOW
Definition: SDL_thread.h:60
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1974
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_threadID
unsigned long SDL_threadID
Definition: SDL_thread.h:49
value
GLsizei const GLfloat * value
Definition: SDL_opengl_glext.h:701
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:30
WIN_SetError
int WIN_SetError(const char *prefix)
SDL_Generic_GetTLSData
SDL_TLSData * SDL_Generic_GetTLSData(void)
Definition: SDL_thread.c:124
SDL_LOG_CATEGORY_SYSTEM
@ SDL_LOG_CATEGORY_SYSTEM
Definition: SDL_log.h:69
SDL_Thread::handle
SYS_ThreadHandle handle
Definition: SDL_thread_c.h:57
SDL_Unsupported
#define SDL_Unsupported()
Definition: SDL_error.h:53
RunThread
static void RunThread(void *args)
Definition: SDL_systhread.cpp:41
SDL_LogWarn
#define SDL_LogWarn
Definition: SDL_dynapi_overrides.h:35
lock
SDL_mutex * lock
Definition: SDL_events.c:83