[sys/info] Add doc.odin with explanation.

core/sys/info/doc.odin

@@ -0,0 +1,78 @@
+/*
+	Copyright 2022 Jeroen van Rijn <[email protected]>.
+	Made available under Odin's BSD-3 license.
+
+	Package `core:sys/info` gathers system information on:
+	Windows, Linux, macOS, FreeBSD & OpenBSD.
+
+	Simply import the package and you'll have access to the OS version, RAM amount
+	and CPU information.
+
+	On Windows, GPUs will also be enumerated using the registry.
+
+	CPU feature flags can be tested against `cpu_features`, where applicable, e.g.
+	`if .aes in si.aes { ... }`
+*/
+// +ignore
+package sysinfo
+
+import "core:fmt"
+import si "core:sys/info"
+
+main :: proc() {
+	fmt.printf("Odin:  %v\n",     ODIN_VERSION)
+	fmt.printf("OS:    %v\n",     si.os_version.as_string)
+	fmt.printf("OS:    %#v\n",    si.os_version)
+	fmt.printf("CPU:   %v\n",     si.cpu_name)
+	fmt.printf("RAM:   %v MiB\n", si.ram.total_ram / 1024 / 1024)
+
+	fmt.println()
+	for gpu, i in si.gpus {
+		fmt.printf("GPU #%v:\n", i)
+		fmt.printf("\tVendor: %v\n",     gpu.vendor_name)
+		fmt.printf("\tModel:  %v\n",     gpu.model_name)
+		fmt.printf("\tVRAM:   %v MiB\n", gpu.total_ram / 1024 / 1024)
+	}
+}
+
+/*
+	Example Windows output:
+		Odin:  dev-2022-09
+		OS:    Windows 10 Professional (version: 20H2), build: 19042.1466
+		OS:    OS_Version{
+			platform = "Windows",
+			major = 10,
+			minor = 0,
+			patch = 0,
+			build = [
+				19042,
+				1466,
+			],
+			version = "20H2",
+			as_string = "Windows 10 Professional (version: 20H2), build: 19042.1466",
+		}
+		CPU:   AMD Ryzen 7 1800X Eight-Core Processor
+		RAM:   65469 MiB
+
+		GPU #0:
+			Vendor: Advanced Micro Devices, Inc.
+			Model:  Radeon RX Vega
+			VRAM:   8176 MiB
+
+	Example macOS output:
+		ODIN: dev-2022-09
+		OS:   OS_Version{
+		        platform = "MacOS",
+		        major = 21,
+		        minor = 5,
+		        patch = 0,
+		        build = [
+		                0,
+		                0,
+		        ],
+		        version = "21F79",
+		        as_string = "macOS Monterey 12.4 (build 21F79, kernel 21.5.0)",
+		}
+		CPU:  Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
+		RAM:  8192 MiB
+*/