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63 lines
1.6 KiB
Odin
63 lines
1.6 KiB
Odin
/*
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A platform agnostic way to reserve/commit/decommit virtual memory.
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virtual.Arena usage
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Example:
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// Source: https://github.com/odin-lang/examples/blob/master/arena_allocator/arena_allocator.odin
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import "core:fmt"
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import "core:os"
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// virtual package implements a multi-purpose arena allocator. If you are on a
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// platform that does not support virtual memory, then there is also a similar
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// arena in `core:mem`.
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import vmem "core:mem/virtual"
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load_files :: proc() -> ([]string, vmem.Arena) {
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// This creates a growing virtual memory arena. It uses virtual memory and
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// can grow as things are added to it.
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arena: vmem.Arena
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arena_err := vmem.arena_init_growing(&arena)
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ensure(arena_err == nil)
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arena_alloc := vmem.arena_allocator(&arena)
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// See arena_init_static for an arena that uses virtual memory, but cannot grow.
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// See arena_init_buffer for an arena that does not use virtual memory,
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// instead it relies on you feeding it a buffer.
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f1, f1_ok := os.read_entire_file("file1.txt", arena_alloc)
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ensure(f1_ok)
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f2, f2_ok := os.read_entire_file("file2.txt", arena_alloc)
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ensure(f2_ok)
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f3, f3_ok := os.read_entire_file("file3.txt", arena_alloc)
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ensure(f3_ok)
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res := make([]string, 3, arena_alloc)
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res[0] = string(f1)
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res[1] = string(f2)
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res[2] = string(f3)
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return res, arena
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}
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main :: proc() {
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files, arena := load_files()
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for f in files {
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fmt.println(f)
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}
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// This deallocates everything that was allocated on the arena:
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// The loaded content of the files as well as the `files` slice.
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vmem.arena_destroy(&arena)
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}
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*/
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package mem_virtual
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