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#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <cstddef>
#include <unistd.h>
#ifdef __APPLE__
#include <dlfcn.h>
#include <mach/mach.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#endif
#include "cpuinfo.h"
#ifdef __linux__
extern "C" CpuInfo *getCpuInfo()
{
CpuInfo *cores = (CpuInfo*) malloc(sizeof(CpuInfo));
FILE *file = fopen("/proc/cpuinfo", "r");
if (file == NULL) return NULL;
char buff[2048];
int coresIndex = -1;
while (fgets(buff, 2048, file)) {
if (strlen(buff) == 0) continue;
short columnSplit = 0;
for (int i = 0; i < (int) strlen(buff); i++) {
if (buff[i] == ':') {
columnSplit = i;
break;
}
}
char *columnName = strndup(buff, columnSplit);
if (columnName == NULL) return NULL;
if (!strncmp("processor", columnName, strlen("processor"))) {
coresIndex++;
if (coresIndex > 0) {
cores = (CpuInfo*) realloc(cores, (coresIndex+1) * sizeof(CpuInfo));
if (cores == NULL) return NULL;
}
#ifdef __PPC__
} else if(!strncmp("cpu", columnName, 3)) {
#else
} else if(!strncmp("model name", columnName, strlen("model name"))) {
#endif
cores[coresIndex].manufacturer = strndup((buff+columnSplit+2), strlen(buff) - 3 - columnSplit);
if (cores[coresIndex].manufacturer == NULL) return NULL;
#ifdef __PPC__
} else if(!strncmp("clock", columnName, strlen("clock"))) {
#else
} else if(!strncmp("cpu MHz", columnName, strlen("cpu MHz"))) {
#endif
char *columnData = strndup((buff+columnSplit+2), strlen(buff) - 3 - columnSplit);
if (columnData == NULL) return NULL;
cores[coresIndex].clockSpeed = atof(columnData);
free(columnData);
}
free(columnName);
}
coresIndex++;
cores = (CpuInfo*) realloc(cores, (coresIndex+1) * sizeof(CpuInfo));
if (cores == NULL) return NULL;
cores[coresIndex] = (CpuInfo) {NULL, 0, 0, 0, 0, 0, 0, 0};
fclose(file);
return cores;
}
#elif __APPLE__
extern "C" CpuInfo *getCpuInfo()
{
unsigned int ticks = (unsigned int) sysconf(_SC_CLK_TCK), multiplier = ((uint64_t)1000L / ticks);
char model[512];
unsigned int freq;
int mib[] = { CTL_HW, HW_CPU_FREQ };
size_t freqSize = sizeof(freq);
sysctl(mib, 2, &freq, &freqSize, NULL, 0);
size_t size;
unsigned int i;
natural_t numcpus;
mach_msg_type_number_t msg_type;
processor_cpu_load_info_data_t *info;
CpuInfo *cores;
size = sizeof(model);
if (sysctlbyname("machdep.cpu.brand_string", model, &size, NULL, 0) &&
sysctlbyname("hw.model", model, &size, NULL, 0)) {
return NULL;
}
if (host_processor_info(mach_host_self(), PROCESSOR_CPU_LOAD_INFO, &numcpus,
(processor_info_array_t*) &info,
&msg_type) != KERN_SUCCESS) {
return NULL;
}
freq = freq / 1000000; // Hz to MHz
cores = (CpuInfo*) malloc(sizeof(CpuInfo) * numcpus);
if (cores == NULL) return NULL;
for (i = 0; i < numcpus; i++) {
cores[i].manufacturer = (char*) malloc(strlen(model)+1);
if(cores[i].manufacturer == NULL) return NULL;
memcpy(cores[i].manufacturer, model, strlen(model));
cores[i].manufacturer[strlen(model)] = '\0';
cores[i].clockSpeed = freq;
cores[i].userTime = info[i].cpu_ticks[0] * multiplier;
cores[i].niceTime = info[i].cpu_ticks[3] * multiplier;
cores[i].systemTime = info[i].cpu_ticks[1] * multiplier;
cores[i].idleTime = info[i].cpu_ticks[2] * multiplier;
cores[i].iowaitTime = 0;
cores[i].irqTime = 0;
}
cores[numcpus] = (CpuInfo) { NULL, 0, 0, 0, 0, 0, 0, 0 };
sysctlbyname("machdep.cpu.brand_string", model, &size, NULL, 0);
memcpy(cores[0].manufacturer, model, strlen(model)); // Manufacturer of the first core dissapears for some reason
return cores;
}
#endif
extern "C" CpuInfo *getCpuTime()
{
CpuInfo *cores = (CpuInfo*) malloc(sizeof(CpuInfo));
FILE *file = fopen("/proc/stat", "r");
if (file == NULL) return NULL;
char buff[2048];
int coresIndex = -1;
int j = 0;
while (fgets(buff, 2048, file)) {
char *name = strndup(buff, 3);
if (name == NULL) return NULL;
if (!strncmp("cpu", name, 3) && isdigit(buff[3])) {
coresIndex++;
if (coresIndex > 0) {
cores = (CpuInfo*) realloc(cores, (coresIndex+1) * sizeof(CpuInfo));
if (cores == NULL) return NULL;
}
int space;
for (int i = 0; i < (int) strlen(buff); i++) {
if (buff[i] == ' ') {
space = i;
break;
}
}
char *cpuDataStart = strndup((buff+space+1), strlen(buff));
if (cpuDataStart == NULL) return NULL;
char *cpuData = cpuDataStart;
// Time to be smart, What I am about to do is dangerous.
char *temp = (char*) &cores[coresIndex];
size_t start = offsetof(CpuInfo, userTime); // getting offset from `userTime` member.
temp = temp + start;
j = 0;
for (int i = 0; i < 6; i++, j++) {
cpuData = (cpuData+j); // offseting string.
for (j = 0; cpuData[j] != ' '; j++);
char *parseStr = strndup(cpuData, j);
if (parseStr == NULL) return NULL;
*(int*) temp = atoi(parseStr);
free(parseStr);
temp = temp + sizeof(int); // switching to next int member.
}
free(cpuDataStart);
}
free(name);
}
coresIndex++;
cores = (CpuInfo*) realloc(cores, (coresIndex+1) * sizeof(CpuInfo));
if (cores == NULL) return NULL;
cores[coresIndex] = (CpuInfo) {NULL, 0, 0, 0, 0, 0, 0, 0};
fclose(file);
return cores;
}
extern "C" CpuInfo *getCpuInfoAndTime()
{
#ifdef __APPLE__
CpuInfo* arr = getCpuInfo();
if (arr == NULL) return (CpuInfo*) malloc(sizeof(CpuInfo));
return arr;
#elif __linux__
CpuInfo* arr = getCpuInfo();
if (arr == NULL) return NULL;
CpuInfo* arr2 = getCpuTime();
if (arr2 == NULL) return NULL;
for (int i = 0; arr[i].manufacturer; i++) {
arr2[i].manufacturer = arr[i].manufacturer;
arr2[i].clockSpeed = arr[i].clockSpeed;
}
free(arr);
return arr2;
#endif
}
extern "C" int getCpuArrayLen(CpuInfo *arr)
{
int i = 0;
for (; arr[i].manufacturer; i++);
return i-1;
}
extern "C" void freeCpuInfoArray(CpuInfo *arr, int len)
{
for (int i = 0; i < len; i++) {
free(arr[i].manufacturer);
}
free(arr);
}
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