[sys/info] Initial version.

core/sys/info/platform_linux.odin

@@ -0,0 +1,54 @@
+// +build linux
+package sysinfo
+
+import "core:c"
+import sys "core:sys/unix"
+import "core:intrinsics"
+// import "core:fmt"
+
+@(init, private)
+init_os_version :: proc "c" () {
+	os_version = {}
+}
+
+Sys_Info :: struct {
+	uptime:    c.long,     // Seconds since boot
+	loads:     [3]c.long,  // 1, 5, 15 minute load averages
+	totalram:  c.ulong,    // Total usable main memory size
+	freeram:   c.ulong,    // Available memory size
+	sharedram: c.ulong,    // Amount of shared memory
+	bufferram: c.ulong,    // Memory used by buffers
+	totalswap: c.ulong,    // Total swap space size
+	freeswap:  c.ulong,    // Swap space still available
+	procs:     c.ushort,   // Number of current processes
+	totalhigh: c.ulong,    // Total high memory size
+	freehigh:  c.ulong,    // Available high memory size
+	mem_unit:  c.int,      // Memory unit size in bytes
+	_padding:  [20 - (2 * size_of(c.long)) - size_of(c.int)]u8,
+}
+
+get_sysinfo :: proc "c" () -> (res: Sys_Info, ok: bool) {
+	si: Sys_Info
+	err := intrinsics.syscall(sys.SYS_sysinfo, uintptr(rawptr(&si)))
+	if err != 0 {
+		// Unable to retrieve sysinfo
+		return {}, false
+	}
+	return si, true
+}
+
+@(init)
+init_ram :: proc() {
+	// Retrieve RAM info using `sysinfo`
+	si, ok := get_sysinfo()
+	if !ok {
+		return
+	}
+
+	ram = RAM{
+		total_ram  = int(si.totalram)  * int(si.mem_unit),
+		free_ram   = int(si.freeram)   * int(si.mem_unit),
+		total_swap = int(si.totalswap) * int(si.mem_unit),
+		free_swap  = int(si.freeswap)  * int(si.mem_unit),
+	}
+}