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Added API function to get CPU cache line size.

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slouken committed Jan 28, 2011
1 parent b9261ce commit f22f044d2da704ae739f74a1968f062857348e3f
Showing with 13 additions and 5 deletions.
  1. +8 −0 include/SDL_cpuinfo.h
  2. +5 −5 src/cpuinfo/SDL_cpuinfo.c
@@ -51,6 +51,14 @@ extern "C" {
*/
extern DECLSPEC int SDLCALL SDL_GetCPUCount(void);

/**
* This function returns the L1 cache line size of the CPU
*
* This is useful for determining multi-threaded structure padding
* or SIMD prefetch sizes.
*/
extern DECLSPEC int SDLCALL SDL_GetCPUCacheLineSize(void);

/**
* This function returns true if the CPU has the RDTSC instruction.
*/
@@ -304,7 +304,7 @@ CPU_haveAltiVec(void)
static int SDL_CPUCount = 0;

int
SDL_GetCPUCount()
SDL_GetCPUCount(void)
{
if (!SDL_CPUCount) {
#if defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)
@@ -335,7 +335,7 @@ SDL_GetCPUCount()

/* Oh, such a sweet sweet trick, just not very useful. :) */
static const char *
SDL_GetCPUType()
SDL_GetCPUType(void)
{
static char SDL_CPUType[13];

@@ -366,7 +366,7 @@ SDL_GetCPUType()
}

static const char *
SDL_GetCPUName()
SDL_GetCPUName(void)
{
static char SDL_CPUName[48];

@@ -437,8 +437,8 @@ SDL_GetCPUName()
return SDL_CPUName;
}

static int
SDL_GetCPUCacheLineSize()
int
SDL_GetCPUCacheLineSize(void)
{
const char *cpuType = SDL_GetCPUType();

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