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atomic-tbl.sh
#!/bin/sh # SPDX-License-Identifier: GPL-2.0 # helpers for dealing with atomics.tbl #meta_in(meta, match) meta_in() { case "$1" in [$2]) return 0;; esac return 1 } #meta_has_ret(meta) meta_has_ret() { meta_in "$1" "bBiIfFlR" } #meta_has_acquire(meta) meta_has_acquire() { meta_in "$1" "BFIlR" } #meta_has_release(meta) meta_has_release() { meta_in "$1" "BFIRs" } #meta_has_relaxed(meta) meta_has_relaxed() { meta_in "$1" "BFIR" } #meta_is_implicitly_relaxed(meta) meta_is_implicitly_relaxed() { meta_in "$1" "vls" } #find_template(tmpltype, pfx, name, sfx, order) find_template() { local tmpltype="$1"; shift local pfx="$1"; shift local name="$1"; shift local sfx="$1"; shift local order="$1"; shift local base="" local file="" # We may have fallbacks for a specific case (e.g. read_acquire()), or # an entire class, e.g. *inc*(). # # Start at the most specific, and fall back to the most general. Once # we find a specific fallback, don't bother looking for more. for base in "${pfx}${name}${sfx}${order}" "${pfx}${name}${sfx}" "${name}"; do file="${ATOMICDIR}/${tmpltype}/${base}" if [ -f "${file}" ]; then printf "${file}" break fi done } #find_fallback_template(pfx, name, sfx, order) find_fallback_template() { find_template "fallbacks" "$@" } #find_kerneldoc_template(pfx, name, sfx, order) find_kerneldoc_template() { find_template "kerneldoc" "$@" } #gen_ret_type(meta, int) gen_ret_type() { local meta="$1"; shift local int="$1"; shift case "${meta}" in [sv]) printf "void";; [bB]) printf "bool";; [aiIfFlR]) printf "${int}";; esac } #gen_ret_stmt(meta) gen_ret_stmt() { if meta_has_ret "${meta}"; then printf "return "; fi } # gen_param_name(arg) gen_param_name() { # strip off the leading 'c' for 'cv' local name="${1#c}" printf "${name#*:}" } # gen_param_type(arg, int, atomic) gen_param_type() { local type="${1%%:*}"; shift local int="$1"; shift local atomic="$1"; shift case "${type}" in i) type="${int} ";; p) type="${int} *";; v) type="${atomic}_t *";; cv) type="const ${atomic}_t *";; esac printf "${type}" } #gen_param(arg, int, atomic) gen_param() { local arg="$1"; shift local int="$1"; shift local atomic="$1"; shift local name="$(gen_param_name "${arg}")" local type="$(gen_param_type "${arg}" "${int}" "${atomic}")" printf "${type}${name}" } #gen_params(int, atomic, arg...) gen_params() { local int="$1"; shift local atomic="$1"; shift while [ "$#" -gt 0 ]; do gen_param "$1" "${int}" "${atomic}" [ "$#" -gt 1 ] && printf ", " shift; done } #gen_args(arg...) gen_args() { while [ "$#" -gt 0 ]; do printf "$(gen_param_name "$1")" [ "$#" -gt 1 ] && printf ", " shift; done } #gen_desc_return(meta) gen_desc_return() { local meta="$1"; shift case "${meta}" in [v]) printf "Return: Nothing." ;; [Ff]) printf "Return: The original value of @v." ;; [R]) printf "Return: The updated value of @v." ;; [l]) printf "Return: The value of @v." ;; esac } #gen_template_kerneldoc(template, class, meta, pfx, name, sfx, order, atomic, int, args...) gen_template_kerneldoc() { local template="$1"; shift local class="$1"; shift local meta="$1"; shift local pfx="$1"; shift local name="$1"; shift local sfx="$1"; shift local order="$1"; shift local atomic="$1"; shift local int="$1"; shift local atomicname="${atomic}_${pfx}${name}${sfx}${order}" local ret="$(gen_ret_type "${meta}" "${int}")" local retstmt="$(gen_ret_stmt "${meta}")" local params="$(gen_params "${int}" "${atomic}" "$@")" local args="$(gen_args "$@")" local desc_order="" local desc_instrumentation="" local desc_return="" if [ ! -z "${order}" ]; then desc_order="${order##_}" elif meta_is_implicitly_relaxed "${meta}"; then desc_order="relaxed" else desc_order="full" fi if [ -z "${class}" ]; then desc_noinstr="Unsafe to use in noinstr code; use raw_${atomicname}() there." else desc_noinstr="Safe to use in noinstr code; prefer ${atomicname}() elsewhere." fi desc_return="$(gen_desc_return "${meta}")" . ${template} } #gen_kerneldoc(class, meta, pfx, name, sfx, order, atomic, int, args...) gen_kerneldoc() { local class="$1"; shift local meta="$1"; shift local pfx="$1"; shift local name="$1"; shift local sfx="$1"; shift local order="$1"; shift local atomicname="${atomic}_${pfx}${name}${sfx}${order}" local tmpl="$(find_kerneldoc_template "${pfx}" "${name}" "${sfx}" "${order}")" if [ -z "${tmpl}" ]; then printf "/*\n" printf " * No kerneldoc available for ${class}${atomicname}\n" printf " */\n" else gen_template_kerneldoc "${tmpl}" "${class}" "${meta}" "${pfx}" "${name}" "${sfx}" "${order}" "$@" fi } #gen_proto_order_variants(meta, pfx, name, sfx, ...) gen_proto_order_variants() { local meta="$1"; shift local pfx="$1"; shift local name="$1"; shift local sfx="$1"; shift gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "" "$@" if meta_has_acquire "${meta}"; then gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_acquire" "$@" fi if meta_has_release "${meta}"; then gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_release" "$@" fi if meta_has_relaxed "${meta}"; then gen_proto_order_variant "${meta}" "${pfx}" "${name}" "${sfx}" "_relaxed" "$@" fi } #gen_proto_variants(meta, name, ...) gen_proto_variants() { local meta="$1"; shift local name="$1"; shift local pfx="" local sfx="" meta_in "${meta}" "fF" && pfx="fetch_" meta_in "${meta}" "R" && sfx="_return" gen_proto_order_variants "${meta}" "${pfx}" "${name}" "${sfx}" "$@" } #gen_proto(meta, ...) gen_proto() { local meta="$1"; shift for m in $(echo "${meta}" | grep -o .); do gen_proto_variants "${m}" "$@" done }
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