182 строки
4.6 KiB
Bash
Executable File
182 строки
4.6 KiB
Bash
Executable File
#!/bin/sh
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# SPDX-License-Identifier: GPL-2.0
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ATOMICDIR=$(dirname $0)
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. ${ATOMICDIR}/atomic-tbl.sh
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#gen_template_fallback(template, meta, pfx, name, sfx, order, atomic, int, args...)
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gen_template_fallback()
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{
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local template="$1"; shift
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local meta="$1"; shift
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local pfx="$1"; shift
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local name="$1"; shift
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local sfx="$1"; shift
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local order="$1"; shift
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local atomic="$1"; shift
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local int="$1"; shift
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local atomicname="${atomic}_${pfx}${name}${sfx}${order}"
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local ret="$(gen_ret_type "${meta}" "${int}")"
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local retstmt="$(gen_ret_stmt "${meta}")"
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local params="$(gen_params "${int}" "${atomic}" "$@")"
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local args="$(gen_args "$@")"
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if [ ! -z "${template}" ]; then
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printf "#ifndef ${atomicname}\n"
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. ${template}
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printf "#define ${atomicname} ${atomicname}\n"
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printf "#endif\n\n"
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fi
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}
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#gen_proto_fallback(meta, pfx, name, sfx, order, atomic, int, args...)
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gen_proto_fallback()
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{
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local meta="$1"; shift
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local pfx="$1"; shift
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local name="$1"; shift
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local sfx="$1"; shift
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local order="$1"; shift
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local tmpl="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
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gen_template_fallback "${tmpl}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@"
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}
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#gen_basic_fallbacks(basename)
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gen_basic_fallbacks()
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{
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local basename="$1"; shift
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cat << EOF
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#define ${basename}_acquire ${basename}
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#define ${basename}_release ${basename}
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#define ${basename}_relaxed ${basename}
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EOF
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}
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#gen_proto_order_variants(meta, pfx, name, sfx, atomic, int, args...)
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gen_proto_order_variants()
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{
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local meta="$1"; shift
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local pfx="$1"; shift
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local name="$1"; shift
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local sfx="$1"; shift
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local atomic="$1"
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local basename="${atomic}_${pfx}${name}${sfx}"
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local template="$(find_fallback_template "${pfx}" "${name}" "${sfx}" "${order}")"
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# If we don't have relaxed atomics, then we don't bother with ordering fallbacks
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# read_acquire and set_release need to be templated, though
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if ! meta_has_relaxed "${meta}"; then
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
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if meta_has_acquire "${meta}"; then
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
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fi
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if meta_has_release "${meta}"; then
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
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fi
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return
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fi
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printf "#ifndef ${basename}_relaxed\n"
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if [ ! -z "${template}" ]; then
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printf "#ifdef ${basename}\n"
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fi
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gen_basic_fallbacks "${basename}"
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if [ ! -z "${template}" ]; then
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printf "#endif /* ${atomic}_${pfx}${name}${sfx} */\n\n"
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
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gen_proto_fallback "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@"
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fi
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printf "#else /* ${basename}_relaxed */\n\n"
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gen_template_fallback "${ATOMICDIR}/fallbacks/acquire" "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@"
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gen_template_fallback "${ATOMICDIR}/fallbacks/release" "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@"
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gen_template_fallback "${ATOMICDIR}/fallbacks/fence" "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@"
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printf "#endif /* ${basename}_relaxed */\n\n"
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}
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gen_xchg_fallbacks()
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{
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local xchg="$1"; shift
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cat <<EOF
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#ifndef ${xchg}_relaxed
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#define ${xchg}_relaxed ${xchg}
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#define ${xchg}_acquire ${xchg}
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#define ${xchg}_release ${xchg}
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#else /* ${xchg}_relaxed */
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#ifndef ${xchg}_acquire
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#define ${xchg}_acquire(...) \\
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__atomic_op_acquire(${xchg}, __VA_ARGS__)
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#endif
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#ifndef ${xchg}_release
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#define ${xchg}_release(...) \\
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__atomic_op_release(${xchg}, __VA_ARGS__)
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#endif
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#ifndef ${xchg}
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#define ${xchg}(...) \\
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__atomic_op_fence(${xchg}, __VA_ARGS__)
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#endif
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#endif /* ${xchg}_relaxed */
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EOF
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}
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cat << EOF
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// SPDX-License-Identifier: GPL-2.0
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// Generated by $0
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// DO NOT MODIFY THIS FILE DIRECTLY
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#ifndef _LINUX_ATOMIC_FALLBACK_H
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#define _LINUX_ATOMIC_FALLBACK_H
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EOF
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for xchg in "xchg" "cmpxchg" "cmpxchg64"; do
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gen_xchg_fallbacks "${xchg}"
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done
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic" "int" ${args}
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done
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cat <<EOF
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#define atomic_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
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#define atomic_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))
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#ifdef CONFIG_GENERIC_ATOMIC64
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#include <asm-generic/atomic64.h>
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#endif
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EOF
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grep '^[a-z]' "$1" | while read name meta args; do
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gen_proto "${meta}" "${name}" "atomic64" "s64" ${args}
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done
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cat <<EOF
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#define atomic64_cond_read_acquire(v, c) smp_cond_load_acquire(&(v)->counter, (c))
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#define atomic64_cond_read_relaxed(v, c) smp_cond_load_relaxed(&(v)->counter, (c))
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#endif /* _LINUX_ATOMIC_FALLBACK_H */
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EOF
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