mc2-scripts-and-benchmarks.git - Benchmarks and execution scripts for testing spatial isolation and SMT interference in MC^2

path: root/SD-VBS/common/toolbox/MultiNcut/cimgnbmap_cross.c

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author	Joshua Bakita <jbakita@cs.unc.edu>	2020-10-17 19:07:11 -0400
committer	Joshua Bakita <jbakita@cs.unc.edu>	2020-10-17 20:54:41 -0400
commit	1120161286ee5c855b630bccc9e0b37bb8a3ee65 (patch)
tree	082a47491403a624a28f8b2bf8e20bbdb3f5e0e7 /SD-VBS/common/toolbox/MultiNcut/cimgnbmap_cross.c
parent	5aad2261f7c012aa16a93c7c5bf6bda0081658fb (diff)

Fix DIS coding style by running them all through clang-format

Also fixes a missing header in DISstressmarkRNG.h and the "all" make target. No functional changes.

Diffstat (limited to 'SD-VBS/common/toolbox/MultiNcut/cimgnbmap_cross.c')

0 files changed, 0 insertions, 0 deletions

bove copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #include <nvgpu/bug.h> #include <nvgpu/rwsem.h> #include <nvgpu/timers.h> #include <nvgpu/posix/rwsem.h> void nvgpu_rwsem_init(struct nvgpu_rwsem *rwsem) { memset(rwsem, 0, sizeof(*rwsem)); nvgpu_spinlock_init(&rwsem->lock); } /* * Acquire. */ void nvgpu_rwsem_down_read(struct nvgpu_rwsem *rwsem) { while (true) { nvgpu_spinlock_acquire(&rwsem->lock); /* * If there's a writer try again. */ if (rwsem->writers < 0) { nvgpu_spinlock_release(&rwsem->lock); nvgpu_msleep(10); continue; } /* * Otherwise decrement the read counter and return. */ rwsem->readers -= 1; nvgpu_spinlock_release(&rwsem->lock); return; } } /* * Release. */ void nvgpu_rwsem_up_read(struct nvgpu_rwsem *rwsem) { nvgpu_spinlock_acquire(&rwsem->lock); rwsem->readers += 1; /* * Can't be any writers if there was a reader. Also can't be * a positive number of readers. The increments are always * downward so if we have a positive number then there is a * balancing bug. */ BUG_ON(rwsem->writers < 0); BUG_ON(rwsem->readers > 0); nvgpu_spinlock_release(&rwsem->lock); } void nvgpu_rwsem_down_write(struct nvgpu_rwsem *rwsem) { while (true) { nvgpu_spinlock_acquire(&rwsem->lock); /* * If there's a reader or a writer try again. Note: in this very * simple implementation it's possible for readers to * indefinitely starve writers. */ if (rwsem->writers < 0 || rwsem->readers < 0) { nvgpu_spinlock_release(&rwsem->lock); nvgpu_msleep(10); continue; } rwsem->writers -= 1; nvgpu_spinlock_release(&rwsem->lock); return; } } void nvgpu_rwsem_up_write(struct nvgpu_rwsem *rwsem) { nvgpu_spinlock_acquire(&rwsem->lock); rwsem->writers += 1; /* * Writers can't be positive: that would be an unbalanced free. Readers * must be zero - otherwise this writer should never have had access! */ BUG_ON(rwsem->writers > 0); BUG_ON(rwsem->readers != 0); nvgpu_spinlock_release(&rwsem->lock); }


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