From c55510b72218a2d0b263eda006fd7aac1496b694 Mon Sep 17 00:00:00 2001 From: Cornelia Huck Date: Thu, 30 Aug 2018 16:59:01 +0200 Subject: [PATCH] qemu-error: add {error, warn}_report_once_cond Add two functions to print an error/warning report once depending on a passed-in condition variable and flip it if printed. This is useful if you want to print a message not once-globally, but e.g. once-per-device. Inspired by warn_once() in hw/vfio/ccw.c, which has been replaced with warn_report_once_cond(). Signed-off-by: Cornelia Huck Message-Id: <20180830145902.27376-2-cohuck@redhat.com> Reviewed-by: Markus Armbruster [Function comments reworded] Signed-off-by: Markus Armbruster --- hw/vfio/ccw.c | 18 +++-------------- include/qemu/error-report.h | 5 +++++ util/qemu-error.c | 40 +++++++++++++++++++++++++++++++++++++ 3 files changed, 48 insertions(+), 15 deletions(-) diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index e96bbdc78b..9246729a75 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -37,24 +37,12 @@ typedef struct VFIOCCWDevice { bool warned_orb_pfch; } VFIOCCWDevice; -static inline void warn_once(bool *warned, const char *fmt, ...) -{ - va_list ap; - - if (!warned || *warned) { - return; - } - *warned = true; - va_start(ap, fmt); - warn_vreport(fmt, ap); - va_end(ap); -} - static inline void warn_once_pfch(VFIOCCWDevice *vcdev, SubchDev *sch, const char *msg) { - warn_once(&vcdev->warned_orb_pfch, "vfio-ccw (devno %x.%x.%04x): %s", - sch->cssid, sch->ssid, sch->devno, msg); + warn_report_once_cond(&vcdev->warned_orb_pfch, + "vfio-ccw (devno %x.%x.%04x): %s", + sch->cssid, sch->ssid, sch->devno, msg); } static void vfio_ccw_compute_needs_reset(VFIODevice *vdev) diff --git a/include/qemu/error-report.h b/include/qemu/error-report.h index 72fab2b031..e415128ac4 100644 --- a/include/qemu/error-report.h +++ b/include/qemu/error-report.h @@ -44,6 +44,11 @@ void error_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2); void warn_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2); void info_report(const char *fmt, ...) GCC_FMT_ATTR(1, 2); +bool error_report_once_cond(bool *printed, const char *fmt, ...) + GCC_FMT_ATTR(2, 3); +bool warn_report_once_cond(bool *printed, const char *fmt, ...) + GCC_FMT_ATTR(2, 3); + /* * Similar to error_report(), except it prints the message just once. * Return true when it prints, false otherwise. diff --git a/util/qemu-error.c b/util/qemu-error.c index a25d3b94c6..4ab428f7e4 100644 --- a/util/qemu-error.c +++ b/util/qemu-error.c @@ -310,3 +310,43 @@ void info_report(const char *fmt, ...) vreport(REPORT_TYPE_INFO, fmt, ap); va_end(ap); } + +/* + * Like error_report(), except print just once. + * If *printed is false, print the message, and flip *printed to true. + * Return whether the message was printed. + */ +bool error_report_once_cond(bool *printed, const char *fmt, ...) +{ + va_list ap; + + assert(printed); + if (*printed) { + return false; + } + *printed = true; + va_start(ap, fmt); + vreport(REPORT_TYPE_ERROR, fmt, ap); + va_end(ap); + return true; +} + +/* + * Like warn_report(), except print just once. + * If *printed is false, print the message, and flip *printed to true. + * Return whether the message was printed. + */ +bool warn_report_once_cond(bool *printed, const char *fmt, ...) +{ + va_list ap; + + assert(printed); + if (*printed) { + return false; + } + *printed = true; + va_start(ap, fmt); + vreport(REPORT_TYPE_WARNING, fmt, ap); + va_end(ap); + return true; +} -- GitLab