linux-kernel - Re: [tip:locking/core] locking/atomics: Simplify the op definitions in atomic.h some more

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Date:   Tue, 15 May 2018 14:13:09 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        will.deacon@....com, mark.rutland@....com,
        torvalds@...ux-foundation.org, paulmck@...ux.vnet.ibm.com,
        tglx@...utronix.de, hpa@...or.com,
        linux-tip-commits@...r.kernel.org
Subject: Re: [tip:locking/core] locking/atomics: Simplify the op definitions
 in atomic.h some more

On Tue, May 15, 2018 at 01:41:44PM +0200, Peter Zijlstra wrote:
> #!/bin/bash
> 
> gen_proto() {
> 	local cnt=0;
> 
> 	proto=$1; shift;
> 	ret=$1; shift;
> 	pfx=$1; shift;
> 	sfx=$1; shift;
> 
> 	echo -n "${ret} ";
> 
> 	name=${proto%(*};
> 	echo -n "${pfx}${name}${sfx}("
> 
> 	args=${proto#*\(};
> 	for arg in ${args//[,)]/ };
> 	do
> 		if [ $cnt -gt 0 ]
> 		then
> 			echo -n ", ";
> 		fi
> 		let cnt++;
> 		echo -n "${TYPES[$arg]} ${arg}"
> 	done
> 	echo ");"
> }
> 
> gen_proto_order() {
> 	gen_proto $1 $2 $3 $4
> 	gen_proto $1 $2 $3 $4_acquire
> 	gen_proto $1 $2 $3 $4_release
> 	gen_proto $1 $2 $3 $4_relaxed
> }
> 
> gen_void_protos() {
> 	grep -v -e "^$" -e "^#" atomic.tbl | while read proto meta;
> 	do
> 		gen_proto ${proto} "void" ${TYPES[pfx]} ""
> 	done
> }
> 
> gen_return_protos() {
> 	grep -v -e "^$" -e "^#" atomic.tbl | while read proto meta;
> 	do
> 		if [[ $meta =~ "R" ]]; then
> 			gen_proto_order ${proto} ${TYPES[i]} ${TYPES[pfx]} "_return"
> 		fi
> 	done
> }
> 
> gen_fetch_protos() {
> 	grep -v -e "^$" -e "^#" atomic.tbl | while read proto meta;
> 	do
> 		if [[ $meta =~ "F" ]]; then
> 			gen_proto_order ${proto} ${TYPES[i]} "${TYPES[pfx]}fetch_" ""
> 		fi
> 	done
> }
> 
> gen_exchange_protos() {
> 	grep -v -e "^$" -e "^#" atomic.tbl | while read proto meta;
> 	do
> 		if [[ $meta =~ "X" ]]; then

			ret=${TYPES[i]};
			if [[ $meta =~ "B" ]]; then
				ret="bool"
			fi
			gen_proto_order ${proto} ${ret} ${TYPES[pfx]} ""

> 		fi
> 	done
> }
> 
> gen_protos() {
> 	gen_void_protos
> 	gen_return_protos
> 	gen_fetch_protos
> 	gen_exchange_protos
> }
> 
> declare -A TYPES=( [pfx]="atomic_" [v]="atomic_t *" [i]="int" [j]="int" [I]="int *" )
> 
> gen_protos
> 
> declare -A TYPES=( [pfx]="atomic64_" [v]="atomic64_t *" [i]="s64" [j]="s64" [I]="s64 *" )
> 
> gen_protos
> 
> declare -A TYPES=( [pfx]="atomic_long_" [v]="atomic_long_t *" [i]="long" [j]="long" [I]="long *" )
> 
> gen_protos
> 
>