The thread pool provides user data to be stored by (pre-)allocating the
necessary memory. A previous attempt was made to have this user data
aligned on a 32 byte boundary (e.g., to prevent segfault with SIMD
instructions, or avoid inefficient data access); the current
implementation, however, leads to unaligned memory access.

This patch attempts again to implement user data to be 32 byte aligned.
First, use memalign() to allocate the actual job on a 32 byte boundary.
Second, use alignas(32) to align the pointer to the user data to be
aligned to 32 bytes. Since it is the last member of the struct, this
ensures that user data, which is allocated right behind it, will be
aligned to 32 bytes as well.

Robert Schmidt authored 2 years ago and Francesco Mani committed 2 years ago

traceFd of thread pool can be:
* -1: no tracing
* valid file descriptor/>0: tracing

fix segv

fix bug redeclaration of same struct in phy sim

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code reveiw comments

This stops all ongoing threads (using pthread_join()), and marks FIFOs
to not block anymore. In this case, returned messages will be NULL.

found by valdgrind in nr_dlsim

This reverts commit 29268d0a.

This reverts commit 96554bef

step-by-step merging from tx-proc-optim-lts. Everything except NR_TRANSPORT merged. Some issues with 64QAM modulation

fix important bug in CU, merge thread pool improvement and rf simulator improvements made initialy in 5G branch