57 lines
1.3 KiB
V
57 lines
1.3 KiB
V
// Copyright (c) 2019-2022 Alexander Medvednikov. All rights reserved.
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// Use of this source code is governed by an MIT license
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// that can be found in the LICENSE file.
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module runtime
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import os
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// nr_jobs returns the same as `nr_cpus` with the difference that if an
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// environment variable `VJOBS` is set, and has a value > 0,
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// then `nr_jobs` will return that number instead.
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// This is useful for runtime tweaking of e.g. threaded or concurrent code.
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pub fn nr_jobs() int {
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mut cpus := nr_cpus() - 1
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// allow for overrides, for example using `VJOBS=32 ./v test .`
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vjobs := os.getenv('VJOBS').int()
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if vjobs > 0 {
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cpus = vjobs
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}
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if cpus == 0 {
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return 1
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}
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return cpus
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}
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// is_32bit returns true if the current executable is running on a 32 bit system.
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pub fn is_32bit() bool {
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$if x32 {
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return true
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}
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return false
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}
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// is_64bit returns true if the current executable is running on a 64 bit system.
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pub fn is_64bit() bool {
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$if x64 {
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return true
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}
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return false
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}
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// is_little_endian returns true if the current executable is running on a little-endian system.
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pub fn is_little_endian() bool {
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$if little_endian {
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return true
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}
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return false
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}
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// is_big_endian returns true if the current executable is running on a big-endian system.
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pub fn is_big_endian() bool {
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$if big_endian {
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return true
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}
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return false
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}
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