Two(≥2) signal handlers execution order when one is interrupted by another?
Suppose in main I register 2 signal handlers for SIGUSR1 and SIGUR2, let's say sig_ur1 and sig_ur2. What's gonna happen when signal SIGUR2 arrives when sig_ur1 is running?
sig_ur1 running ----> signal SIGUR2 arrives ----> :
sig_ur1keeps running ->sig_ur1finishes ->sig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restores(variables keep the same value whensig_ur1left) ->sig_ur1finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restarts(all variables are initialized again) ->sig_ur1finishes -> return tomain
Which option is the correct one? Or neither is correct? I did not find any articles talking about this, so providing any related material would be much appreciated. :)
signals
asked 3 mins ago
RickRick
264310
add a comment |
Suppose in main I register 2 signal handlers for SIGUSR1 and SIGUR2, let's say sig_ur1 and sig_ur2. What's gonna happen when signal SIGUR2 arrives when sig_ur1 is running?
sig_ur1 running ----> signal SIGUR2 arrives ----> :
sig_ur1keeps running ->sig_ur1finishes ->sig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restores(variables keep the same value whensig_ur1left) ->sig_ur1finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restarts(all variables are initialized again) ->sig_ur1finishes -> return tomain
Which option is the correct one? Or neither is correct? I did not find any articles talking about this, so providing any related material would be much appreciated. :)
signals
asked 3 mins ago
RickRick
264310
add a comment |
Suppose in main I register 2 signal handlers for SIGUSR1 and SIGUR2, let's say sig_ur1 and sig_ur2. What's gonna happen when signal SIGUR2 arrives when sig_ur1 is running?
sig_ur1 running ----> signal SIGUR2 arrives ----> :
sig_ur1keeps running ->sig_ur1finishes ->sig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restores(variables keep the same value whensig_ur1left) ->sig_ur1finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restarts(all variables are initialized again) ->sig_ur1finishes -> return tomain
Which option is the correct one? Or neither is correct? I did not find any articles talking about this, so providing any related material would be much appreciated. :)
signals
asked 3 mins ago
RickRick
264310
Suppose in main I register 2 signal handlers for SIGUSR1 and SIGUR2, let's say sig_ur1 and sig_ur2. What's gonna happen when signal SIGUR2 arrives when sig_ur1 is running?
sig_ur1 running ----> signal SIGUR2 arrives ----> :
sig_ur1keeps running ->sig_ur1finishes ->sig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restores(variables keep the same value whensig_ur1left) ->sig_ur1finishes -> return tomainsig_ur2starts to run ->sig_ur2finishes ->sig_ur1restarts(all variables are initialized again) ->sig_ur1finishes -> return tomain
Which option is the correct one? Or neither is correct? I did not find any articles talking about this, so providing any related material would be much appreciated. :)
signals
signals
asked 3 mins ago
RickRick
264310
asked 3 mins ago
RickRick
264310
asked 3 mins ago
RickRick
264310
asked 3 mins ago
RickRick
264310
asked 3 mins ago
RickRick
264310
264310
add a comment |
add a comment |
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