windows和linux下获取当前程序路径以及cpu数
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- #ifdef WIN32
- #include <Windows.h>
- #else
- #include <stdio.h>
- #include <unistd.h>
- #endif
- #include <assert.h>
- std::string getCurrentAppPath()
- {
- #ifdef WIN32
- char path[MAX_PATH + 1] = {0};
- if (GetModuleFileName(NULL, path, MAX_PATH) != 0)
- return std::string(path);
- #else
- char path[256] = {0};
- char filepath[256] = {0};
- char cmd[256] = {0};
- FILE* fp = NULL;
- // 设置进程所在proc路径
- sprintf(filepath, "/proc/%d", getpid());
- // 将当前路径设为进程路径
- if(chdir(filepath) != -1)
- {
- //指定待执行的shell 命令
- snprintf(cmd, 256, "ls -l | grep exe | awk '{print $10}'");
- if((fp = popen(cmd,"r")) == NULL)
- {
- return std::string();
- }
- //读取shell命令执行结果到字符串path中
- if (fgets(path, sizeof(path)/sizeof(path[0]), fp) == NULL)
- {
- pclose(fp);
- return std::string();
- }
- //popen开启的fd必须要pclose关闭
- pclose(fp);
- return std::string(path);
- }
- #endif
- return std::string();
- }
- std::size_t getCpuCount()
- {
- #ifdef WIN32
- SYSTEM_INFO sysInfo;
- GetSystemInfo(&sysInfo);
- return sysInfo.dwNumberOfProcessors;
- #else
- long cpu_num = sysconf(_SC_NPROCESSORS_ONLN);
- if (cpu_num == -1)
- {
- assert(false);
- return 0;
- }
- // 看两者是否相等
- assert(cpu_num == sysconf(_SC_NPROCESSORS_CONF));
- return cpu_num;
- #endif
- }