diff options
Diffstat (limited to 'mk/internal')
| -rw-r--r-- | mk/internal/locking.mk | 131 |
1 files changed, 91 insertions, 40 deletions
diff --git a/mk/internal/locking.mk b/mk/internal/locking.mk index 7a0bed0c484..4943835212e 100644 --- a/mk/internal/locking.mk +++ b/mk/internal/locking.mk @@ -1,39 +1,62 @@ -# $NetBSD: locking.mk,v 1.1 2006/08/04 05:55:18 rillig Exp $ +# $NetBSD: locking.mk,v 1.2 2006/08/04 20:52:27 rillig Exp $ # -# acquire-lock and release-lock are two .USE macro targets that aquire -# and release coarse-grained locks. There are two areas of pkgsrc that -# can be locked: The WRKDIR of a specific package or the LOCALBASE. -# Which of those is locked depends on the name of the target where the -# {acquire,release}-lock macro is used. If it contains -install-, as for -# example acquire-install-lock, LOCALBASE is locked. Otherwise, WRKDIR -# is locked. +# This file provides the following .USE targets: +# +# acquire-lock +# Acquires a coarse-grained lock in WRKDIR. +# +# release-lock +# Releases the lock in WRKDIR. +# +# acquire-localbase-lock +# Acquires a coarse-grained lock in LOCALBASE. +# +# release-localbase-lock +# Releases the lock in LOCALBASE. # -# _WRKDIR_LOCKFILE= ${WRKDIR}/.lockfile -_PREFIX_LOCKFILE= ${PKG_DBDIR}/.lockfile -_GET_LOCKFILE_CMD= \ - case ${.TARGET} in \ - *-install-*) lockfile=${_PREFIX_LOCKFILE};; \ - *) lockfile=${_WRKDIR_LOCKFILE};; \ - esac +_LOCALBASE_LOCKFILE= ${LOCALBASE}/.lockfile + +# +# Sanity checks. +# -acquire-lock: .USE .if ${PKGSRC_LOCKTYPE} == "none" - @${DO_NADA} -.else - @if ${TEST} ! -x ${SHLOCK:Q}""; then \ - ${ERROR_MSG} "The ${SHLOCK:Q} utility does not exist, and is necessary for locking."; \ - ${ERROR_MSG} "Please \""${MAKE:Q}" install\" in ../../pkgtools/shlock."; \ - exit 1; \ - fi +# No further checks. +.elif ${PKGSRC_LOCKTYPE} == "once" || ${PKGSRC_LOCKTYPE} == "sleep" . if !defined(OBJHOSTNAME) - @${ERROR_MSG} "PKGSRC_LOCKTYPE needs OBJHOSTNAME defined."; \ - exit 1 +PKG_FAIL_REASON+= "[locking.mk] PKGSRC_LOCKTYPE needs OBJHOSTNAME defined." . endif - ${_PKG_SILENT}${_PKG_DEBUG}set -e; \ - ${_GET_LOCKFILE_CMD}; \ +.else +PKG_FAIL_REASON+= "[locking.mk] PKGSRC_LOCKTYPE must be one of {none,once,sleep}, not ${PKGSRC_LOCKTYPE}." +.endif + +# +# Needed tools. +# + +.if ${PKGSRC_LOCKTYPE} != "none" +USE_TOOLS+= shlock +.endif +.if ${PKGSRC_LOCKTYPE} == "sleep" +USE_TOOLS+= sleep +.endif + +# +# The commands. +# + +_CHECK_IF_SHLOCK_IS_AVAILABLE_CMD= \ + ${TEST} -x ${SHLOCK:Q}"" || { \ + ${ERROR_MSG} "[locking.mk] shlock is not installed."; \ + ${ERROR_MSG} "[locking.mk] Please \"cd ../../pkgtools/shlock && ${MAKE} install\"."; \ + exit 1; \ + } + +_ACQUIRE_LOCK_CMD= \ + ${_CHECK_IF_SHLOCK_IS_AVAILABLE_CMD}; \ ppid=`${PS} -p $$$$ -o ppid | ${AWK} 'NR == 2 { print $$1 }'`; \ if ${TEST} -z "$$ppid"; then \ ${ERROR_MSG} "No parent process ID found."; \ @@ -49,7 +72,7 @@ acquire-lock: .USE fi; \ lockdir=`echo "$$lockfile" | sed "s,/[^/]*\$$,,"`; \ ${MKDIR} "$$lockdir"; \ - if ${SHLOCK} -f "$$lockfile" -p $$ppid; then \ + if ${SHLOCK} -f "$$lockfile" -p "$$ppid"; then \ break; \ fi; \ lockpid=`${CAT} "$$lockfile"`; \ @@ -61,22 +84,50 @@ acquire-lock: .USE ${SLEEP} ${PKGSRC_SLEEPSECS}; \ ;; \ esac; \ - done; \ - if ${PKG_VERBOSE:D${TRUE}:U${FALSE}}; then \ - lockpid=`${CAT} "$$lockfile"`; \ - ${STEP_MSG} "Lock acquired for \`\`${.TARGET:S/^acquire-//:S/-lock$//}'' on behalf of process $$lockpid"; \ - fi + done; +.if defined(PKG_VERBOSE) +_ACQUIRE_LOCK_CMD+= \ + lockpid=`${CAT} "$$lockfile"`; \ + ${STEP_MSG} "Lock $$lockfile acquired for \`\`${.TARGET:S/^acquire-//:S/-lock$//}'' on behalf of process $$lockpid"; .endif -release-lock: .USE +_RELEASE_LOCK_CMD= # nothing +.if defined(PKG_VERBOSE) +_RELEASE_LOCK_CMD+= \ + lockpid=`${CAT} "$$lockfile"`; \ + ${STEP_MSG} "Lock $$lockfile released for \`\`${.TARGET:S/^release-//:S/-lock$//}'' on behalf of process $$lockpid"; +.endif +_RELEASE_LOCK_CMD+= \ + ${RM} -f "$$lockfile" + +# +# The targets. +# + +.PHONY: acquire-lock release-lock +.PHONY: acquire-localbase-lock release-localbase-lock + .if ${PKGSRC_LOCKTYPE} == "none" +acquire-lock release-lock acquire-localbase-lock release-localbase-lock: .USE @${DO_NADA} .else +acquire-lock: .USE ${_PKG_SILENT}${_PKG_DEBUG} set -e; \ - ${_GET_LOCKFILE_CMD}; \ - if ${PKG_VERBOSE:D${TRUE}:U${FALSE}}; then \ - lockpid=`${CAT} "$$lockfile"`; \ - ${STEP_MSG} "Lock released for \`\`${.TARGET:S/^release-//:S/-lock$//}'' on behalf of process $$lockpid"; \ - fi; \ - ${RM} -f "$$lockfile" + lockfile=${_WRKDIR_LOCKFILE}; \ + ${_ACQUIRE_LOCK_CMD} + +release-lock: .USE + ${_PKG_SILENT}${_PKG_DEBUG} set -e; \ + lockfile=${_WRKDIR_LOCKFILE}; \ + ${_RELEASE_LOCK_CMD} + +acquire-localbase-lock: .USE + ${_PKG_SILENT}${_PKG_DEBUG} set -e; \ + lockfile=${_LOCALBASE_LOCKFILE}; \ + ${_ACQUIRE_LOCK_CMD} + +release-localbase-lock: .USE + ${_PKG_SILENT}${_PKG_DEBUG} set -e; \ + lockfile=${_LOCALBASE_LOCKFILE}; \ + ${_RELEASE_LOCK_CMD} .endif |