41 lines
1.1 KiB
Go
41 lines
1.1 KiB
Go
// Copyright 2019 Google Inc. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package build
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import (
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"encoding/binary"
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"syscall"
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)
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func detectTotalRAM(ctx Context) uint64 {
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s, err := syscall.Sysctl("hw.memsize")
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if err != nil {
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ctx.Printf("Failed to get system memory size: %v", err)
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return 0
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}
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// syscall.Sysctl assumes that the return value is a string and trims the last byte if it is 0.
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if len(s) == 7 {
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s += "\x00"
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}
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if len(s) != 8 {
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ctx.Printf("Failed to get system memory size, returned %d bytes, expecting 8 bytes", len(s))
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return 0
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}
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return binary.LittleEndian.Uint64([]byte(s))
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}
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