Add libhv and test http client

vendor/libhv/include/hv/hsysinfo.h

@@ -0,0 +1,68 @@
+#ifndef HV_SYS_INFO_H_
+#define HV_SYS_INFO_H_
+
+#include "hplatform.h"
+
+#ifdef OS_LINUX
+#include <sys/sysinfo.h>
+#endif
+
+#ifdef OS_DARWIN
+#include <mach/mach_host.h>
+#include <sys/sysctl.h>
+#endif
+
+static inline int get_ncpu() {
+#ifdef OS_WIN
+    SYSTEM_INFO si;
+    GetSystemInfo(&si);
+    return si.dwNumberOfProcessors;
+#else
+    //return get_nprocs();
+    //return get_nprocs_conf();
+    //return sysconf(_SC_NPROCESSORS_ONLN);     // processors available
+    return sysconf(_SC_NPROCESSORS_CONF);     // processors configured
+#endif
+}
+
+typedef struct meminfo_s {
+    unsigned long total;    // KB
+    unsigned long free;     // KB
+} meminfo_t;
+
+static inline int get_meminfo(meminfo_t* mem) {
+#ifdef OS_WIN
+    MEMORYSTATUSEX memstat;
+    memset(&memstat, 0, sizeof(memstat));
+    memstat.dwLength = sizeof(memstat);
+    GlobalMemoryStatusEx(&memstat);
+    mem->total = (unsigned long)(memstat.ullTotalPhys >> 10);
+    mem->free = (unsigned long)(memstat.ullAvailPhys >> 10);
+    return 0;
+#elif defined(OS_LINUX)
+    struct sysinfo info;
+    if (sysinfo(&info) < 0) {
+        return errno;
+    }
+    mem->total = info.totalram * info.mem_unit >> 10;
+    mem->free = info.freeram * info.mem_unit >> 10;
+    return 0;
+#elif defined(OS_DARWIN)
+    uint64_t memsize = 0;
+    size_t size = sizeof(memsize);
+    int which[2] = {CTL_HW, HW_MEMSIZE};
+    sysctl(which, 2, &memsize, &size, NULL, 0);
+    mem->total = memsize >> 10;
+
+    vm_statistics_data_t info;
+    mach_msg_type_number_t count = sizeof(info) / sizeof(integer_t);
+    host_statistics(mach_host_self(), HOST_VM_INFO, (host_info_t)&info, &count);
+    mem->free = ((uint64_t)info.free_count * sysconf(_SC_PAGESIZE)) >> 10;
+    return 0;
+#else
+    (void)(mem);
+    return -10;
+#endif
+}
+
+#endif // HV_SYS_INFO_H_